unconditionally destroy the client on unregister

This avoids conditions where two sessions can be attached to the same client
while not logged into an account.

irc/accounts.go

 		delete(am.skeletonToAccount, additionalSkel)
 	}
 	for _, client := range clients {
-		if config.Accounts.RequireSasl.Enabled {
-			client.Logout()
-			client.Quit(client.t("You are no longer authorized to be on this server"), nil)
-			// destroy acquires a semaphore so we can't call it while holding a lock
-			go client.destroy(nil)
-		} else {
-			am.logoutOfAccount(client)
-		}
+		client.Logout()
+		client.Quit(client.t("You are no longer authorized to be on this server"), nil)
+		// destroy acquires a semaphore so we can't call it while holding a lock
+		go client.destroy(nil)
 	}
 
 	if err != nil && !erase {

irc/nickname.go

 
 var (
 	restrictedNicknames = []string{
-		"=scene=",  // used for rp commands
+		"=scene=", // used for rp commands
 	}
 
 	restrictedCasefoldedNicks = make(map[string]bool)