Periodical run of remaining currently disabled special pages on en.wiki

All looks well (<https://bugzilla.wikimedia.org/show_bug.cgi?id=15434#c79>):
proceed to step 3 (<https://bugzilla.wikimedia.org/show_bug.cgi?id=15434#c70>).

Adding the 6 special pages disabled only on en.wiki. We use the same format
as for the others, though it's quite redundant for a single cluster.
fr.wiki and wikidata also have additional disablings, but they will be dealt
with separately (or rather, only fr.wiki will, for now by me).

Bug: 15434
Change-Id: Ic453d6e47c8548ea164fde9e95435fce6e503b27