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