Merge branch 'tf/gitweb-ss-tweak'

Tweak Gitweb CSS to layout some elements better.

* tf/gitweb-ss-tweak:
  gitweb: make search help link less ugly
  gitweb: omit the repository owner when it is unset
  gitweb: vertically centre contents of page footer
  gitweb: ensure OPML text fits inside its box

diff --cc gitweb/gitweb.perl
Simple merge