Patch to original IRCnet ircd-irc2-2.11.2p2 to add -Chans which behave
exactly like +Chans (modeless), but allow setting a Topic.

Author: Andreas 'APic' Pickart
Credits to all Contributors to ircd
License: GPL

diff a/common/struct_def.h b/common/struct_def.h
--- a/common/struct_def.h
+++ b/common/struct_def.h
@@ -771,9 +771,10 @@ struct Channel	{
 #define       IsMember(u, c)          (u && (u)->user && \
 		       find_channel_link((u)->user->channel, c) ? 1 : 0)
 # define	IsChannelName(n)	((n) && (*(n) == '#' || *(n) == '&' ||\
-					*(n) == '+' || \
+                                       *(n) == '+' || *(n) == '-' || \
 					(*(n) == '!' && cid_ok(n, CHIDLEN))))
 #define	IsQuiet(x)		((x)->mode.mode & MODE_QUIET)
+#define	UseTopic(n)		((n) && (*(n) == '-'))
 #define	UseModes(n)		((n) && (*(n) == '#' || *(n) == '&' || \
 					 *(n) == '!'))
 
diff a/common/support.c b/common/support.c
--- a/common/support.c
+++ b/common/support.c
@@ -808,8 +808,8 @@ char	**make_isupport(void)
 	/* Warning: There must be up to 12 tokens in each string */
 	tis[0] = (char *) MyMalloc(BUFSIZE);
 	sprintf(tis[0],
-		"RFC2812 PREFIX=(ov)@+ CHANTYPES=#&!+ MODES=%d "
-		"CHANLIMIT=#&!+:%d "
+		"RFC2812 PREFIX=(ov)@+ CHANTYPES=#&!+- MODES=%d "
+		"CHANLIMIT=#&!+-:%d "
 		"NICKLEN=%d TOPICLEN=%d KICKLEN=%d MAXLIST=beIR:%d "
 		"CHANNELLEN=%d IDCHAN=!:%d CHANMODES=beIR,k,l,imnpstaqr",
 		MAXMODEPARAMS, MAXCHANNELSPERUSER,
diff a/ircd/channel.c b/ircd/channel.c
--- a/ircd/channel.c
+++ b/ircd/channel.c
@@ -3161,7 +3161,7 @@ int	m_topic(aClient *cptr, aClient *sptr, int parc, char *parv[])
 				parv[0], name);
 			continue;
 		}
-		if (!UseModes(name))
+		if (!UseModes(name) && !UseTopic(name))
 		{
 			sendto_one(sptr, replies[ERR_NOCHANMODES], ME, 
 				parv[0], name);