This was also long overdue. Also fix a bug that caused page creations to
not be shown when examining past edits (using rc_last_oldid doesn't work
for page creations).
Bug: T201193
Bug: T262903
Change-Id: I5f7a994add12332c950904146248c5de7c2beee5
This will decouple a bit the huge and chaotic tangle of AF classes. Some
boilerplate code for AbuseFilter services is also added with this patch.
Note that this requires injecting a KeywordsManager in
AbuseFilterVariableHolder, or unit tests would fail. This is still
incomplete, and the Manager is only injected in tests, because
VariableHolder still has to be refactored.
The test for the UpdateVarDumps script had to be updated, because
serializing VHs in there was a bad choice. As pointed out in a comment,
the test is likely going to break again once we remove the BC code, but
I hope that we'll be able to remove the test at that point.
Change-Id: I12a656a310adb8c5f75cab63f6db9e121e109717
