* Get notification from server
Don't sync repo when repo is subscribed
Get notification from server
* Disconnect notification server when subscribed repos is 0 and modify log info
* Add jwt certification
* Use server lock
* VS add libwebsockets
* Add check notification server
* Check notif server once
* Check locks and folder perms after fileserver is recovered
* Add comment
Co-authored-by: heran yang <heran.yang@seafile.com>