This one is abit of a tricky thing, lets try to
explain what i mean.
Define (globally) irc-networks to be used in znc.
lets say, efnet:
So user defines servers for irc-net globally, and you
just write/select the irc-net a user should connect
to. ZNC then automatically chooses a server that fits
(jump to next server if a host is down, avoid too
many connections to the same server to avoid getting
banned, jump to next server when k-lined or whatever).