Integrate iConf.network in iConf itself as the distinction between

these "network settings" and other settings has been lost in time.

Rename some of these variables and macro's.
ircnetwork -> NETWORK_NAME
ircnet005 -> NETWORK_NAME_005
defserv ->? DEFAULT_SERVER
hidden_host -> CLOAK_PREFIX
helpchan -> HELP_CHANNEL

Also one config change (visible to admins):
set::hiddenhost-prefix is now set::cloak-prefix
We still accept the old name, though.
The example conf has been updated as well, but not the wiki yet.

src/modules/server.c

@@ -1483,7 +1483,7 @@ int server_sync(Client *client, ConfigItem_link *aconf, int incoming)
 	sendto_one(client, NULL, "NETINFO %i %lld %i %s 0 0 0 :%s",
 	    irccounts.global_max, (long long)TStime(), UnrealProtocol,
 	    CLOAK_KEYCRC,
-	    ircnetwork);
+	    NETWORK_NAME);
 
 	/* Send EOS (End Of Sync) to the just linked server... */
 	sendto_one(client, NULL, ":%s EOS", me.id);