Allow to "/cycle" current channel

I occasionally find it necessary to part and rejoin channels, be it to fix some permissions issue with ChanServ or to prod ZNC into rejoining a stuck channel, etc.

Not to keep stealing ideas from Textual 😁 but it does have a /cycle command that does precisely this: It parts the current channel, and then rejoins it.

Maybe this would even be a good first “real” contribution (code, not just ideas) for someone like me?

[AlMcKinlay]

That seems like an odd command, to be honest. And /hop could be confusing as it could be expected to be like /op instead of /cycle.

I suggest we do /cycle and /rejoin, and when we get plugins started (I’ll be starting work on this once #1266 is merged, I promise) then someone can create one to make this command if they want. Sensible?

[xPaw]

/join is just bypassed to the server, as there is no need to implement it for us.

“rejoin” is usually attached to rejoining channels upon being kicked.

That basically still does what cycle does, so we don’t have any confusion there.