* debian/implicit: add proper dependencies to support 'parallel build'
  through make -j (thx Daniel Schepler for the patch).
* debian/rules: support 'nocheck' in DEB_BUILD_OPTIONS to skip running
  the selftests.
* debian/diff/0003-bug-448655-check-etc-mailname-if-author-email-is-un.diff:
  new; check /etc/mailname if author email is unknown (closes: #448655).
* debian/gitweb.docs: new; install gitweb/README.
* new upstream point release.
  * git-cvsimport: really convert underscores in branch names to dots with
    -u (closes: #446495).
  * git-mailsplit: with maildirs not only process cur/, but also new/
    (closes: #447396).
* debian/diff/0004-contrib-hooks-post-receive-email-make-subject-prefix.diff:
  new; cherry-pick'ed from master: contrib/hooks/post-receive-email: make
  subject prefix configurable (closes: #428418).