Merge branch 'rf/web'

* rf/web:
  gitweb: Use rev-list --skip option.
  gitweb: Change history action to use parse_commits.
  gitweb: Change atom, rss actions to use parse_commits.
  gitweb: Change header search action to use parse_commits.
  gitweb: Change log action to use parse_commits.
  gitweb: Change summary, shortlog actions to use parse_commits.
  gitweb: We do longer need the --parents flag in rev-list.
  gitweb: Add parse_commits, used to bulk load commit objects.