show old protection in prop=info, if no new protection exists

show old protection in prop=info, if no new protection exists

prop=info shows only old protection from page.page_restrictions, if a
new protection in table page_restrictions was found, because only in the
foreach was the old protection checked, but that foreach operated
on pages, which was found in table page_restrictions. Doing an extra
foreach over the array of old protection fix this.
This change also removes the join from the query to table
page_restrictions, because the code already know the needed ns/dbkey.

Change-Id: I52111f30e4fa9550c82d18db33efda5edec59c66