relay: add configurable list of nick globs to always tag

Closes #276.

example-conf.yml

@@ -413,6 +413,11 @@ relay:
     # experimental.
     tag_nicks: true
 
+    # If tag_nicks is False, this specifies a list of NICK globs that network
+    # tags should be added for anyways (e.g. for network services).
+    forcetag_nicks:
+        - "*Serv"
+
 games:
     # Sets the nick of the Games service, if you're using it.
     nick: Games

plugins/relay.py

@@ -101,9 +101,18 @@ def normalizeNick(irc, netname, nick, times_tagged=0, uid=''):
     separator = irc.serverdata.get('separator') or \
         conf.conf.get('relay', {}).get('separator') or "/"
 
-    # Figure out whether we tag nicks by default or not.
-    if times_tagged == 0 and conf.conf.get('relay', {}).get('tag_nicks', True):
+    # Figure out whether we tag nicks or not.
+    if times_tagged == 0:
+        if conf.conf.get('relay', {}).get('tag_nicks', True):
             times_tagged = 1
+        else:
+            forcetag_nicks = conf.conf.get('relay', {}).get('forcetag_nicks', [])
+            log.debug('(%s) relay.normalizeNick: checking if globs %s match %s.', irc.name, forcetag_nicks, nick)
+            for glob in forcetag_nicks:
+                if irc.matchHost(glob, nick):
+                    # User matched a nick to force tag nicks for. Tag them.
+                    times_tagged = 1
+                    break
 
     log.debug('(%s) relay.normalizeNick: using %r as separator.', irc.name, separator)
     orig_nick = nick