RSFNC: allow RSFNC against a target which just changes the capitalization of the nickname

atheme/charybdis/03510227383f6960bab1aac757411f670e15848a
Add sendto_channel_local_with_capability().

atheme/charybdis/commit/99cca61ed6ed21d8084edb66f98a5f27aaca21a6
Add extended-join client capability.

The extended-join client capability extends the JOIN message with information clients typically query using WHO including accountname, signon TS and realname.

atheme/charybdis/commit/92052a5c241040687ee65e2131ad7a3bf4209d2e
Make flood control settings configurable by those who know exactly what they're doing.

atheme/charybdis/commit/e6e54763d9654d6c1012172d5af6cc3b4a0e40a3
Fix extended-join not sending any joins at all.

Note that IsCapable(x, NOCAPS) always returns true.

atheme/charybdis/commit/e2b507ac41887aa4e8b7652f0f5c2081c943c192