gitweb: Navbar refactoring - use git_page_nav to generate navigation bar
gitweb: Navbar refactoring - use git_page_nav to generate navigation bar

Use git_page_nav subroutine to generate navigation bar.  Additional
navigation (either formats or pager/pagination) is put into variables.

Corrects error in git_search where hash parameter was added to
"summary" link instead of to "log" link.  Might differ from previous
version by additional "<br/>" in navigation bar.

Signed-off-by: Jakub Narebski <a6a1517a087f9f64a72f41a0de57ff01fbb0e412@gmail.com>
Signed-off-by: Junio C Hamano <dc50d1021234060e53ec42a77d526afa2fe07479@cox.net>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git