Document "Unpublish Event" and "Publish Without Email" in the server synchronization settings

[cudeso]

Currently the settings under "Misc settings" are not fully documented.

• Unpublish Event
  -> Works for pull events
• Publish Without Email
  -> Works with push events
• Self Signed
• Skip proxy (if applicable)

[Wachizungu]

Added things for everything.
Self signed was already there I think.

For unpublish event, I have the opposite as you in my tests though, it seems to work on push but not on pull and we actually count on this in our production environment. Can you please confirm for you it works only on pull? Honestly I tend to believe this is a bug in either case and should work in both situations. Will see if someone from core team comments here, if not I'll ask on gitter.

Publish without email I can't test myself as I don't have an instance with working email to test. Please let me know / double check if it only works on push, if so I'll add that. Again, that also sounds like a bug to me though.

Some other questions I have:

• Does the push/pull galaxy clusters mean that you push/pull custom galaxy clusters? Or that you push/pull clusters related to the galaxy tags you sync or have synced.
• Related to the above. Why is there a specific pull technique to pull in galaxy clusters, but the same does not exist for push? I'm guessing this might be because if the answer to the above question is 'you push/pull clusters related to the galaxy tags you sync or have synced.' having this option for push doesn't make much sense.
• There is a checkbox to 'push sightings' but nothing for 'pull sightings', are sightings always pulled in or never?
• If self signed is set, ssl_verify_peer_name is set to false as well (see https://github.com/MISP/MISP/blob/2.4/app/Lib/Tools/SyncTool.php#L25). I'm assuming this flag in essence says: 'whatever, I don't care, cert is okay even if the name doesn't match'. If that is correct I still have to change the text a bit.

[cudeso]

Sorry for the late update.
In the versions >=2.4.139 it seems the "unpublish event" does not work on Pull.
Going to try your fix MISP/MISP#7199

@iglocska Will "unpublish be removed (as in MISP/MISP#7139 (comment))? I personally feel that unpublishing an event after pulling it in makes sense.