Make most snotes NETWIDE

[dwfreed]

trafficstars

I did look through most of these to make sure they were sane, but a second set of eyes would be good. I didn't touch most snotes for bans (K/D/X lines, RESVs) because I figured we could do those when we rework ban propagation and elimination of clusters and such.

[edk0]

I'm not thrilled about making things netwide snotes that are propagated globally anyway.

[dwfreed]

Connect needs to be netwide, because only the local server knows the connection class; the others that are propagated that previously had a snote extension I'd be open to integrating into the appropriate place. But sno_globaloper was a hack (checks for umode +o), and sno_globalkline is the hackiest of hacks (checks for specific quit messages), so those definitely need to go.

[dwfreed]

(The sasl_abort1 test failures are because the connect snotes are now in the server sendq)