Ensure that pathrev is set in ViewVC links
Ensure that pathrev is set in ViewVC links

This ensures that links work even after the files are
deleted or moved

Fixes #273

(cherry picked from commit 2495ce0230d8821222b1ce6f9fb83858289f3f04)

mantisbt-plugins/source-integration,make-all/source-integration,mantisbt-plugins/source-integration,mantisbt-plugins/source-integration,dregad/source-integration,dregad/source-integration,dregad/source-integration,make-all/source-integration,make-all/source-integration