- obfuscate db password in logs for engine connection string

- #574 Show pull request status also in shortlog (if any)

- remember selected tab in my account page

- Bumped mercurial version to 2.3.2

- Add git version detection to warn users that Git used in system is to

  old. Ref #588 - also show git version in system details in settings page

- fixed files quick filter links

- #590 Add GET flag that controls the way the diff are generated, for pull

  requests we want to use non-bundle based diffs, That are far better for

  doing code reviews. The /compare url still uses bundle compare for full

  comparison including the incoming changesets

- Fixed #585, checks for status of revision where to strict, and made

  opening pull request with those revision impossible due to previously set

  status. Checks now are made also for the repository.

- fixes #591 git backend was causing encoding errors when handling binary

  files - added a test case for VCS lib tests