diff --git a/default.yaml b/default.yaml
index bb785fb8..87a91a57 100644
--- a/default.yaml
+++ b/default.yaml
@@ -49,6 +49,8 @@ server:
 
         # The standard SSL/TLS port for IRC is 6697. This will listen on all interfaces:
         ":6697":
+            # this is a standard TLS configuration with a single certificate;
+            # see the manual for instructions on how to configure SNI
             tls:
                 cert: fullchain.pem
                 key: privkey.pem
diff --git a/docs/MANUAL.md b/docs/MANUAL.md
index 3a40d1cf..94bda532 100644
--- a/docs/MANUAL.md
+++ b/docs/MANUAL.md
@@ -49,6 +49,7 @@ _Copyright © Daniel Oaks <daniel@danieloaks.net>, Shivaram Lingamneni <slingamn
     - [Redirect from plaintext to TLS](#how-can-i-redirect-users-from-plaintext-to-tls)
     - [Reverse proxies](#reverse-proxies)
     - [Client certificates](#client-certificates)
+    - [SNI](#sni)
 - [Modes](#modes)
     - [User Modes](#user-modes)
     - [Channel Modes](#channel-modes)
@@ -606,6 +607,20 @@ Oragono supports authenticating to user accounts via TLS client certificates. Th
 
 Client certificates are not supported over websockets due to a [Chrome bug](https://bugs.chromium.org/p/chromium/issues/detail?id=329884).
 
+## SNI
+
+Oragono supports [SNI](https://en.wikipedia.org/wiki/Server_Name_Indication); this is useful if you have multiple domain names for your server, with different certificates covering different domain names. Configure your TLS listener like this:
+
+```yaml
+        ":6697":
+            tls-certificates:
+                -
+                    cert: cert1.pem
+                    key:  key1.pem
+                -
+                    cert: cert2.pem
+                    key:  key2.pem
+```
 
 --------------------------------------------------------------------------------------------
 
diff --git a/irc/chanserv.go b/irc/chanserv.go
index 13d9e9bf..62e6483c 100644
--- a/irc/chanserv.go
+++ b/irc/chanserv.go
@@ -79,7 +79,9 @@ AMODE lists or modifies persistent mode settings that affect channel members.
 For example, $bAMODE #channel +o dan$b grants the holder of the "dan"
 account the +o operator mode every time they join #channel. To list current
 accounts and modes, use $bAMODE #channel$b. Note that users are always
-referenced by their registered account names, not their nicknames.`,
+referenced by their registered account names, not their nicknames.
+The permissions hierarchy for adding and removing modes is the same as in
+the ordinary /MODE command.`,
 			helpShort: `$bAMODE$b modifies persistent mode settings for channel members.`,
 			enabled:   chanregEnabled,
 			minParams: 1,
@@ -144,7 +146,6 @@ If no regex is provided, all registered channels are returned.`,
 INFO displays info about a registered channel.`,
 			helpShort: `$bINFO$b displays info about a registered channel.`,
 			enabled:   chanregEnabled,
-			minParams: 1,
 		},
 		"get": {
 			handler: csGetHandler,
@@ -743,6 +744,12 @@ func csListHandler(service *ircService, server *Server, client *Client, command
 }
 
 func csInfoHandler(service *ircService, server *Server, client *Client, command string, params []string, rb *ResponseBuffer) {
+	if len(params) == 0 {
+		// #765
+		listRegisteredChannels(service, client.Account(), rb)
+		return
+	}
+
 	chname, err := CasefoldChannel(params[0])
 	if err != nil {
 		service.Notice(rb, client.t("Invalid channel name"))
diff --git a/irc/config.go b/irc/config.go
index c0a831d1..35313f02 100644
--- a/irc/config.go
+++ b/irc/config.go
@@ -8,6 +8,7 @@ package irc
 import (
 	"bytes"
 	"crypto/tls"
+	"crypto/x509"
 	"errors"
 	"fmt"
 	"io"
@@ -54,12 +55,15 @@ type TLSListenConfig struct {
 
 // This is the YAML-deserializable type of the value of the `Server.Listeners` map
 type listenerConfigBlock struct {
-	TLS       TLSListenConfig
-	Proxy     bool
-	Tor       bool
-	STSOnly   bool `yaml:"sts-only"`
-	WebSocket bool
-	HideSTS   bool `yaml:"hide-sts"`
+	// normal TLS configuration, with a single certificate:
+	TLS TLSListenConfig
+	// SNI configuration, with multiple certificates:
+	TLSCertificates []TLSListenConfig `yaml:"tls-certificates"`
+	Proxy           bool
+	Tor             bool
+	STSOnly         bool `yaml:"sts-only"`
+	WebSocket       bool
+	HideSTS         bool `yaml:"hide-sts"`
 }
 
 type HistoryCutoff uint
@@ -536,11 +540,10 @@ type Config struct {
 		passwordBytes  []byte
 		Name           string
 		nameCasefolded string
-		// Listeners is the new style for configuring listeners:
-		Listeners    map[string]listenerConfigBlock
-		UnixBindMode os.FileMode        `yaml:"unix-bind-mode"`
-		TorListeners TorListenersConfig `yaml:"tor-listeners"`
-		WebSockets   struct {
+		Listeners      map[string]listenerConfigBlock
+		UnixBindMode   os.FileMode        `yaml:"unix-bind-mode"`
+		TorListeners   TorListenersConfig `yaml:"tor-listeners"`
+		WebSockets     struct {
 			AllowedOrigins       []string `yaml:"allowed-origins"`
 			allowedOriginRegexps []*regexp.Regexp
 		}
@@ -845,13 +848,30 @@ func (conf *Config) Operators(oc map[string]*OperClass) (map[string]*Oper, error
 	return operators, nil
 }
 
-func loadTlsConfig(config TLSListenConfig, webSocket bool) (tlsConfig *tls.Config, err error) {
-	cert, err := tls.LoadX509KeyPair(config.Cert, config.Key)
-	if err != nil {
-		return nil, &CertKeyError{Err: err}
+func loadTlsConfig(config listenerConfigBlock) (tlsConfig *tls.Config, err error) {
+	var certificates []tls.Certificate
+	if len(config.TLSCertificates) != 0 {
+		// SNI configuration with multiple certificates
+		for _, certPairConf := range config.TLSCertificates {
+			cert, err := loadCertWithLeaf(certPairConf.Cert, certPairConf.Key)
+			if err != nil {
+				return nil, err
+			}
+			certificates = append(certificates, cert)
+		}
+	} else if config.TLS.Cert != "" {
+		// normal configuration with one certificate
+		cert, err := loadCertWithLeaf(config.TLS.Cert, config.TLS.Key)
+		if err != nil {
+			return nil, err
+		}
+		certificates = append(certificates, cert)
+	} else {
+		// plaintext!
+		return nil, nil
 	}
 	clientAuth := tls.RequestClientCert
-	if webSocket {
+	if config.WebSocket {
 		// if Chrome receives a server request for a client certificate
 		// on a websocket connection, it will immediately disconnect:
 		// https://bugs.chromium.org/p/chromium/issues/detail?id=329884
@@ -859,12 +879,26 @@ func loadTlsConfig(config TLSListenConfig, webSocket bool) (tlsConfig *tls.Confi
 		clientAuth = tls.NoClientCert
 	}
 	result := tls.Config{
-		Certificates: []tls.Certificate{cert},
+		Certificates: certificates,
 		ClientAuth:   clientAuth,
 	}
 	return &result, nil
 }
 
+func loadCertWithLeaf(certFile, keyFile string) (cert tls.Certificate, err error) {
+	// LoadX509KeyPair: "On successful return, Certificate.Leaf will be nil because
+	// the parsed form of the certificate is not retained." tls.Config:
+	// "Note: if there are multiple Certificates, and they don't have the
+	// optional field Leaf set, certificate selection will incur a significant
+	// per-handshake performance cost."
+	cert, err = tls.LoadX509KeyPair(certFile, keyFile)
+	if err != nil {
+		return
+	}
+	cert.Leaf, err = x509.ParseCertificate(cert.Certificate[0])
+	return
+}
+
 // prepareListeners populates Config.Server.trueListeners
 func (conf *Config) prepareListeners() (err error) {
 	if len(conf.Server.Listeners) == 0 {
@@ -880,12 +914,9 @@ func (conf *Config) prepareListeners() (err error) {
 		if lconf.STSOnly && !conf.Server.STS.Enabled {
 			return fmt.Errorf("%s is configured as a STS-only listener, but STS is disabled", addr)
 		}
-		if block.TLS.Cert != "" {
-			tlsConfig, err := loadTlsConfig(block.TLS, block.WebSocket)
-			if err != nil {
-				return err
-			}
-			lconf.TLSConfig = tlsConfig
+		lconf.TLSConfig, err = loadTlsConfig(block)
+		if err != nil {
+			return &CertKeyError{Err: err}
 		}
 		lconf.RequireProxy = block.TLS.Proxy || block.Proxy
 		lconf.WebSocket = block.WebSocket
diff --git a/irc/mysql/history.go b/irc/mysql/history.go
index c744af1f..0e24cf36 100644
--- a/irc/mysql/history.go
+++ b/irc/mysql/history.go
@@ -395,7 +395,7 @@ func (mysql *MySQL) deleteCorrespondents(ctx context.Context, threshold int64) {
 		mysql.logError("error deleting correspondents", err)
 	} else {
 		count, err := result.RowsAffected()
-		if err != nil {
+		if !mysql.logError("error deleting correspondents", err) {
 			mysql.logger.Debug(fmt.Sprintf("deleted %d correspondents entries", count))
 		}
 	}
diff --git a/irc/nickserv.go b/irc/nickserv.go
index 5bf45c4b..86ecb65d 100644
--- a/irc/nickserv.go
+++ b/irc/nickserv.go
@@ -817,14 +817,21 @@ func nsInfoHandler(service *ircService, server *Server, client *Client, command
 	for _, nick := range account.AdditionalNicks {
 		service.Notice(rb, fmt.Sprintf(client.t("Additional grouped nick: %s"), nick))
 	}
-	for _, channel := range server.accounts.ChannelsForAccount(accountName) {
-		service.Notice(rb, fmt.Sprintf(client.t("Registered channel: %s"), channel))
-	}
+	listRegisteredChannels(service, accountName, rb)
 	if account.Suspended != nil {
 		service.Notice(rb, suspensionToString(client, *account.Suspended))
 	}
 }
 
+func listRegisteredChannels(service *ircService, accountName string, rb *ResponseBuffer) {
+	client := rb.session.client
+	channels := client.server.accounts.ChannelsForAccount(accountName)
+	service.Notice(rb, fmt.Sprintf(client.t("You have %d registered channel(s)."), len(channels)))
+	for _, channel := range rb.session.client.server.accounts.ChannelsForAccount(accountName) {
+		service.Notice(rb, fmt.Sprintf(client.t("Registered channel: %s"), channel))
+	}
+}
+
 func nsRegisterHandler(service *ircService, server *Server, client *Client, command string, params []string, rb *ResponseBuffer) {
 	details := client.Details()
 	passphrase := params[0]
@@ -961,6 +968,8 @@ func nsUnregisterHandler(service *ircService, server *Server, client *Client, co
 			service.Notice(rb, ircfmt.Unescape(client.t("$bWarning: erasing this account will allow it to be re-registered; consider UNREGISTER instead.$b")))
 		} else {
 			service.Notice(rb, ircfmt.Unescape(client.t("$bWarning: unregistering this account will remove its stored privileges.$b")))
+			service.Notice(rb, ircfmt.Unescape(client.t("$bNote that an unregistered account name remains reserved and cannot be re-registered.$b")))
+			service.Notice(rb, ircfmt.Unescape(client.t("$bIf you are having problems with your account, contact an administrator.$b")))
 		}
 		service.Notice(rb, fmt.Sprintf(client.t("To confirm, run this command: %s"), fmt.Sprintf("/NS %s %s %s", strings.ToUpper(command), accountName, expectedCode)))
 		return
diff --git a/irc/uban.go b/irc/uban.go
index d7651baf..b28fa6f4 100644
--- a/irc/uban.go
+++ b/irc/uban.go
@@ -13,6 +13,7 @@ import (
 
 	"github.com/oragono/oragono/irc/custime"
 	"github.com/oragono/oragono/irc/flatip"
+	"github.com/oragono/oragono/irc/sno"
 	"github.com/oragono/oragono/irc/utils"
 )
 
@@ -160,18 +161,64 @@ func ubanAddHandler(client *Client, target ubanTarget, params []string, rb *Resp
 
 	switch target.banType {
 	case ubanCIDR:
-		ubanAddCIDR(client, target, duration, requireSASL, operReason, rb)
+		err = ubanAddCIDR(client, target, duration, requireSASL, operReason, rb)
 	case ubanNickmask:
-		ubanAddNickmask(client, target, duration, operReason, rb)
+		err = ubanAddNickmask(client, target, duration, operReason, rb)
 	case ubanNick:
-		ubanAddAccount(client, target, duration, operReason, rb)
-
+		err = ubanAddAccount(client, target, duration, operReason, rb)
+	}
+	if err == nil {
+		announceUban(client, true, target, duration, requireSASL, operReason)
 	}
 	return false
 }
 
-func ubanAddCIDR(client *Client, target ubanTarget, duration time.Duration, requireSASL bool, operReason string, rb *ResponseBuffer) {
-	err := client.server.dlines.AddNetwork(target.cidr, duration, requireSASL, "", operReason, client.Oper().Name)
+func announceUban(client *Client, add bool, target ubanTarget, duration time.Duration, requireSASL bool, operReason string) {
+	oper := client.Oper()
+	if oper == nil {
+		return
+	}
+	operName := oper.Name
+
+	var buf strings.Builder
+	fmt.Fprintf(&buf, "Operator %s", operName)
+
+	if add {
+		buf.WriteString(" added")
+	} else {
+		buf.WriteString(" removed")
+	}
+	switch target.banType {
+	case ubanCIDR:
+		buf.WriteString(" an IP-based")
+	case ubanNickmask:
+		buf.WriteString(" a NUH-mask")
+	case ubanNick:
+		buf.WriteString(" an account suspension")
+	}
+	buf.WriteString(" UBAN against ")
+	switch target.banType {
+	case ubanCIDR:
+		buf.WriteString(target.cidr.String())
+	case ubanNickmask, ubanNick:
+		buf.WriteString(target.nickOrMask)
+	}
+	if duration != 0 {
+		fmt.Fprintf(&buf, " [duration: %v]", duration)
+	}
+	if requireSASL {
+		buf.WriteString(" [require-SASL]")
+	}
+	if operReason != "" {
+		fmt.Fprintf(&buf, " [reason: %s]", operReason)
+	}
+	line := buf.String()
+	client.server.snomasks.Send(sno.LocalXline, line)
+	client.server.logger.Info("opers", line)
+}
+
+func ubanAddCIDR(client *Client, target ubanTarget, duration time.Duration, requireSASL bool, operReason string, rb *ResponseBuffer) (err error) {
+	err = client.server.dlines.AddNetwork(target.cidr, duration, requireSASL, "", operReason, client.Oper().Name)
 	if err == nil {
 		rb.Notice(fmt.Sprintf(client.t("Successfully added UBAN for %s"), target.cidr.HumanReadableString()))
 	} else {
@@ -192,10 +239,11 @@ func ubanAddCIDR(client *Client, target ubanTarget, duration time.Duration, requ
 			rb.Notice(line)
 		}
 	}
+	return
 }
 
-func ubanAddNickmask(client *Client, target ubanTarget, duration time.Duration, operReason string, rb *ResponseBuffer) {
-	err := client.server.klines.AddMask(target.nickOrMask, duration, "", operReason, client.Oper().Name)
+func ubanAddNickmask(client *Client, target ubanTarget, duration time.Duration, operReason string, rb *ResponseBuffer) (err error) {
+	err = client.server.klines.AddMask(target.nickOrMask, duration, "", operReason, client.Oper().Name)
 	if err == nil {
 		rb.Notice(fmt.Sprintf(client.t("Successfully added UBAN for %s"), target.nickOrMask))
 	} else {
@@ -229,9 +277,10 @@ func ubanAddNickmask(client *Client, target ubanTarget, duration time.Duration,
 		}
 		rb.Notice(client.t("You can suspend their accounts instead; try /UBAN ADD <nickname>"))
 	}
+	return
 }
 
-func ubanAddAccount(client *Client, target ubanTarget, duration time.Duration, operReason string, rb *ResponseBuffer) {
+func ubanAddAccount(client *Client, target ubanTarget, duration time.Duration, operReason string, rb *ResponseBuffer) (err error) {
 	account := target.nickOrMask
 	// TODO this doesn't enumerate all sessions if ForceNickEqualsAccount is disabled
 	var sessionData []SessionData
@@ -239,7 +288,7 @@ func ubanAddAccount(client *Client, target ubanTarget, duration time.Duration, o
 		sessionData, _ = mcl.AllSessionData(nil, true)
 	}
 
-	err := client.server.accounts.Suspend(account, duration, client.Oper().Name, operReason)
+	err = client.server.accounts.Suspend(account, duration, client.Oper().Name, operReason)
 	switch err {
 	case nil:
 		rb.Notice(fmt.Sprintf(client.t("Successfully suspended account %s"), account))
@@ -254,6 +303,7 @@ func ubanAddAccount(client *Client, target ubanTarget, duration time.Duration, o
 	default:
 		rb.Notice(client.t("An error occurred"))
 	}
+	return
 }
 
 func ubanDelHandler(client *Client, target ubanTarget, params []string, rb *ResponseBuffer) bool {
@@ -276,6 +326,7 @@ func ubanDelHandler(client *Client, target ubanTarget, params []string, rb *Resp
 	}
 	if err == nil {
 		rb.Notice(fmt.Sprintf(client.t("Successfully removed ban on %s"), targetString))
+		announceUban(client, false, target, 0, false, "")
 	} else {
 		rb.Notice(fmt.Sprintf(client.t("Could not remove ban: %v"), err))
 	}
diff --git a/traditional.yaml b/traditional.yaml
index 3dc24556..47601ac4 100644
--- a/traditional.yaml
+++ b/traditional.yaml
@@ -23,6 +23,8 @@ server:
 
         # The standard SSL/TLS port for IRC is 6697. This will listen on all interfaces:
         ":6697":
+            # this is a standard TLS configuration with a single certificate;
+            # see the manual for instructions on how to configure SNI
             tls:
                 cert: fullchain.pem
                 key: privkey.pem