Add BindHost to prevent random "Connection timed out" errors

Also see: http://b.wardje.eu/2011/12/znc-failing-to-connect.html

roles/ircbouncer/templates/var_lib_znc_configs_znc.conf.j2

 	TimestampFormat = [%H:%M:%S]
 
 	<Network freenode>
+		BindHost = 0.0.0.0
 		FloodBurst = 4
 		FloodRate = 1.00
 		IRCConnectEnabled = true