Fix a problem claiming the network cap
Fix a problem claiming the network cap

I don't really understand why, but the previous implementation was
giving us a nil cap. The current solution is the same as in IRC Idler,
which works.

zenhack/sandstorm-znc,zenhack/sandstorm-znc,zenhack/sandstorm-znc,zenhack/sandstorm-znc,zenhack/sandstorm-znc