Revert "Revert: Experimental change - disable uid check"

This reverts commit 1367fc1935ee23bd25ea6bf0687ba141b4d96426.

Signed-off-by: Dariusz Olszewski <starypatyk@users.noreply.github.com>

lib/private/Share20/DefaultShareProvider.php

@@ -674,13 +674,6 @@ class DefaultShareProvider implements IShareProvider {
 		 */
 		if ($reshares === false) {
 			$qb->andWhere($qb->expr()->eq('uid_initiator', $qb->createNamedParameter($userId)));
-		} else {
-			$qb->andWhere(
-				$qb->expr()->orX(
-					$qb->expr()->eq('uid_owner', $qb->createNamedParameter($userId)),
-					$qb->expr()->eq('uid_initiator', $qb->createNamedParameter($userId))
-				)
-			);
 		}
 
 		// todo? maybe get these from the oc_mounts table