Updated wikipedia.org etc. A/AAAA records to point to eqiad

These were missed during the eqiad migration, and were the only
remaining reason for text traffic to pmtpa. I updated the bulk of
them using a script, and also did the following things manually:

* Updated wikimedia.com, added missing AAAA
* Added missing AAAA record to wikivoyage.org
* Updated wmftest.org, email.donate.wikimedia.org
* Removed commented-out entry for donate.wikimedia.org, to avoid false
  positives when grepping for remaining A records.

Avoiding the use of Squid should help with bug 31369.

Change-Id: I3adffd88650afa337deccddf44d0d473237e92c2