Allow Re-Sharing of folders shared by circle

[alx-tuilmenau]

If a user is in circle A and a folder is shared to this circle with re-sharing permission, the user cannot re-share the folder or a subfolder without this line. There is a error message in the log:

{"reqId":"R0th0ufni5warwevBqni","level":3,"time":"2019-09-27T07:46:38+00:00","remoteAddr":"xxx.xx.xx.xx","user":"xxx","app":"PHP","method":"POST","url":"\/ocs\/v2.php\/apps\/f/v1\/shares?format=json","message":"Undefined variable: permissions at \/data\/nextcloud_16\/lib\/private\/Share20\/Manager.php#325","userAgent":"Mozilla\/5.0 (Macintosh; Intel MppleWebKit\/605.1.15 (KHTML, like Gecko) Version\/13.0 Safari\/605.1.15","version":"16.0.4.1"}
{"reqId":"R0th0ufni5warwevBqni","level":3,"time":"2019-09-27T07:46:38+00:00","remoteAddr":"xxx.xx.xx.xx","user":"xxx","app":"PHP","method":"POST","url":"\/ocs\/v2.php\/apps\/f/v1\/shares?format=json","message":"Error: Unsupported operand types at \/data\/nextcloud_16\/lib\/private\/Share20\/Manager.php#325","userAgent":"Mozilla\/5.0 (Macintosh; Intel AppleWebKit\/605.1.15 (KHTML, like Gecko) Version\/13.0 Safari\/605.1.15","version":"16.0.4.1"}

[gary-kim]

@alx-tuilmenau Thank you for your contribution.
Could you add a DCO sign-off to your commit? The easiest way would be to add the -s flag from the command line. Since you already made this commit, you can run the following command to add a DCO: git commit -s --amend then git push --force.
Otherwise, you can also add the following to the bottom of your commit message.

Signed-off-by: Random J Developer <random@developer.example.org>

[alx-tuilmenau]

@gary-kim I'm sorry, I copied the line from my test machine to the github web interface, I didn't use the git client. I don't know how to update the commit message within the github web.

[gary-kim]

I'm not sure if you can amend commits in the GitHub web interface. The easiest thing to to may be to clone the repo on your computer and amend your commit message.

[blizzz]

Looks good, would like to have a final say from @daita

[skjnldsv]

Ping @daita !

[ArtificialOwl]

duplicate of (already merged) #17735