publicsshareprovider: Allow creating/updating public links on received shares #4429
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The permission check when trying to create an internal link of a received share did not work correctly. Internal links have all Permissions set to false. The 'SufficientCS3Permissions' method treats an all-false PermissionSet as a deny grant, which a wrong in the public link case.
We can skip the 'SufficientCS3Permissions' check for internal links however, since the creation of a internal link should always be allowed as long as the user has the 'AddGrant' permission.
Related Issue: owncloud/ocis#8039