Fixes to auth detection and message parsing

* don't check authentication if the network doesn't need to
  register
* don't pass through muser for ZNC type messages
* avoid duplicate message for queries containing highlights
* make a copy of the cast for metadata analysis to avoid poisoning it
* set up callback for when the instance is authenticated, so we can
  request a LIST immediately if so desired
* separate out seeding functions to populate CHANLIMIT to ease future
  work involving other options, such as PREFIX

modules/network.py

@@ -3,6 +3,7 @@ import json
 
 from modules import alias
 from modules.chankeep import nukeNetwork
+from modules.regproc import needToRegister
 from twisted.internet import reactor
 from core.bot import IRCBot, IRCBotFactory
 import main
@@ -28,13 +29,10 @@ class Network:
         elif num == self.last:
             self.last += 1
         registered = False
-        if self.net in main.irc.keys():
-            if "register" in main.irc[self.net].keys():
-                if not main.irc[self.net]["register"]:
-                    registered = True
-                    # Don't need to register if it's been disabled in definitions,
-                    #  so we'll pretend we already did
-
+        if not needToRegister(self.net):
+            registered = True
+            # Don't need to register if it's been disabled in definitions,
+            #  so we'll pretend we already did
         self.relays[num] = {
             "enabled": main.config["ConnectOnCreate"],
             "net": self.net,