scripting API for IP bans

See discussion on #68.

irc/config.go

@@ -282,13 +282,18 @@ type AccountConfig struct {
 	AuthScript  AuthScriptConfig `yaml:"auth-script"`
 }
 
+type ScriptConfig struct {
+	Enabled        bool
+	Command        string
+	Args           []string
+	Timeout        time.Duration
+	KillTimeout    time.Duration `yaml:"kill-timeout"`
+	MaxConcurrency uint          `yaml:"max-concurrency"`
+}
+
 type AuthScriptConfig struct {
-	Enabled     bool
-	Command     string
-	Args        []string
-	Autocreate  bool
-	Timeout     time.Duration
-	KillTimeout time.Duration `yaml:"kill-timeout"`
+	ScriptConfig `yaml:",inline"`
+	Autocreate   bool
 }
 
 // AccountRegistrationConfig controls account registration.
@@ -526,8 +531,9 @@ type Config struct {
 		supportedCaps *caps.Set
 		capValues     caps.Values
 		Casemapping   Casemapping
-		EnforceUtf8   bool   `yaml:"enforce-utf8"`
-		OutputPath    string `yaml:"output-path"`
+		EnforceUtf8   bool         `yaml:"enforce-utf8"`
+		OutputPath    string       `yaml:"output-path"`
+		IPCheckScript ScriptConfig `yaml:"ip-check-script"`
 	}
 
 	Roleplay struct {