Update hunt_server() so command is really the command (eg "LUSERS") and

not a format string (eg ":%s LUSERS %s"). It now simply concats all parv[]'s.
That is, up to parc count. And it automatically does the :stuff for the
last parameter if it contains spaces or starts with a : etc.

This gets rid of a bit sketchy code with an arbitrary maximum etc.

Now it's just:
if (hunt_server(client, NULL, "REHASH", 1, parc, parv) != HUNTED_ISME)
	return;

This has one side effect, though:
Previously we used the format string, so it may be possible for S2S
traffic to now have more arguments then before here and there.
Eg:
* It could be that the caller was using a format string to
  intentionally cut off an extra parameter at the end.
  You can still do that if you call with eg parc-1 instead of parc.
  I don't think there were any such cases though, but hard to rule out.
* Extranous parameters may show up in S2S traffic where it was
  previously unexpected.

src/modules/admin.c

@@ -61,7 +61,7 @@ CMD_FUNC(cmd_admin)
 
 	if (IsUser(client))
 	{
-		if (hunt_server(client, recv_mtags, ":%s ADMIN :%s", 1, parc, parv) != HUNTED_ISME)
+		if (hunt_server(client, recv_mtags, "ADMIN", 1, parc, parv) != HUNTED_ISME)
 			return;
 	}