Ignore forbidden exception when fetching share mtime on SMB for symlinks
Ignore forbidden exception when fetching share mtime on SMB for symlinks

See https://github.com/nextcloud/server/pull/7556#issuecomment-499028026

Signed-off-by: Morris Jobke <7f550a9f4c44173a37664d938f1355f0f92a47a7@morrisjobke.de>

nextcloud/server,andreas-p/nextcloud-server,andreas-p/nextcloud-server,andreas-p/nextcloud-server,nextcloud/server,nextcloud/server,andreas-p/nextcloud-server,andreas-p/nextcloud-server,nextcloud/server