Update error messages for user mode +b and channel Mode +M.

Replaced error message for channel mode +M with ERR_NEEDREGGEDNICK_MSG
(used by Bahamut, inspircd, ircu & Unreal too) and using numeric 477
and the msg simliar like inspircd.

Replaced the error message ERR_CANNOTSENDTONICK_MSG for user mode +b
with ERR_NONONREG_MSG and using numeric 486, similar like unrealircd.

(cherry picked from commit 55a61ab17f63a9e757b7c7598c31b98ce5a132e8
and commit 3737d9ab7da1ea0485cefc07c65dc5308bf0db02)

src/ngircd/channel.c

@@ -918,7 +918,11 @@ Channel_Write(CHANNEL *Chan, CLIENT *From, CLIENT *Client, const char *Command,
 	if (!Can_Send_To_Channel(Chan, From)) {
 		if (! SendErrors)
 			return CONNECTED;	/* no error, see RFC 2812 */
-		return IRC_WriteStrClient(From, ERR_CANNOTSENDTOCHAN_MSG,
+		if (strchr(Channel_Modes(Chan), 'M'))
+			return IRC_WriteStrClient(From, ERR_NEEDREGGEDNICK_MSG,
+						  Client_ID(From), Channel_Name(Chan));
+		else
+			return IRC_WriteStrClient(From, ERR_CANNOTSENDTOCHAN_MSG,
 					  Client_ID(From), Channel_Name(Chan));
 	}
 

src/ngircd/irc.c

@@ -506,7 +506,7 @@ Send_Message(CLIENT * Client, REQUEST * Req, int ForceType, bool SendErrors)
 			    !(Client_Type(from) == CLIENT_SERVER) &&
 			    !(Client_Type(from) == CLIENT_SERVICE)) {
 				if (SendErrors && !IRC_WriteStrClient(from,
-						ERR_CANNOTSENDTONICK_MSG,
+						ERR_NONONREG_MSG,
 						Client_ID(from), Client_ID(cl)))
 					return DISCONNECTED;
 				goto send_next_target;

src/ngircd/messages.h

@@ -136,6 +136,7 @@
 #define ERR_BANNEDFROMCHAN_MSG		"474 %s %s :Cannot join channel (+b) -- You are banned"
 #define ERR_BADCHANNELKEY_MSG		"475 %s %s :Cannot join channel (+k) -- Wrong channel key"
 #define ERR_NOCHANMODES_MSG		"477 %s %s :Channel doesn't support modes"
+#define ERR_NEEDREGGEDNICK_MSG		"477 %s %s :Cannot send to channel (+M) -- You need to be identified to a registered account to message this channel"
 #define ERR_LISTFULL_MSG		"478 %s %s %s: Channel list is full (%d)"
 #define ERR_NOPRIVILEGES_MSG		"481 %s :Permission denied"
 #define ERR_CHANOPRIVSNEEDED_MSG	"482 %s %s :You are not channel operator"
@@ -144,6 +145,7 @@
 #define ERR_CANTKILLSERVER_MSG		"483 %s :You can't kill a server!"
 #define ERR_RESTRICTED_MSG		"484 %s :Your connection is restricted"
 #define ERR_NICKREGISTER_MSG		"484 %s :Cannot modify user mode (+R) -- Use IRC services"
+#define ERR_NONONREG_MSG		"486 %s :Cannot send to user (+b) -- You must identify to a registered nick to private message %s"
 #define ERR_NOOPERHOST_MSG		"491 %s :Not configured for your host"
 #define ERR_NOTONSAMECHANNEL_MSG	"493 %s :You must share a common channel with %s"
 
@@ -151,7 +153,6 @@
 #define ERR_UMODEUNKNOWNFLAG2_MSG	"501 %s :Unknown mode \"%c%c\""
 #define ERR_USERSDONTMATCH_MSG		"502 %s :Can't set/get mode for other users"
 #define ERR_NOINVITE_MSG		"518 %s :Cannot invite to %s (+V)"
-#define ERR_CANNOTSENDTONICK_MSG	"976 %s :Cannot send to user (+b) -- Only registered users can message %s"
 
 #ifdef ZLIB
 # define RPL_STATSLINKINFOZIP_MSG	"211 %s %s %d %ld %ld/%ld %ld %ld/%ld :%ld"

src/testsuite/message-test.e

@@ -61,7 +61,7 @@ expect {
 send "privmsg nick :test\r"
 expect {
 	timeout { exit 1 }
-	"976"
+	"486"
 }
 send "mode nick -b\r"
 expect {