Documentation on +M clarified in helpfile and module source code

help/opers/cmode

@@ -46,6 +46,7 @@ NO PARAMETERS:
    * +M     - Immune. Opers cannot be kicked from the channel. May
               be set by admins regardless of channel status. Users
               will not see this mode at all. Can only be set by admins.
+              Opers may still be kicked from the channel by services.
   ?* +O     - Oper only channel. Only opers will be able to join.
   ?* +A     - Admin only channel. Only admins will be able to join.
               Can only be set by admins.

modules/core/m_kick.c

@@ -173,6 +173,7 @@ m_kick(struct Client *client_p, struct Client *source_p, int parc, const char *p
 			return 0;
 		}
 
+		//NOTE: Will not stop kicks from services.
 		if (MyClient(source_p) && chptr->mode.mode & MODE_NOOPERKICK && IsOper(who))
 		{
 			sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,