Add a way to override interwiki prefixes

Authored by dcausse on Oct 12 2017, 10:33 AM.

Description

Add a way to override interwiki prefixes

Duplicates some specific overrides done in WikimediaMaintenance::DumpInterwiki
to map 's' to 'src' on svwiki.
Sadly I found no easy to unify these configurations.

Bug: T177913
Change-Id: I85e3190ae04b6e1db6075ef72e993f4266c02956

Details