gitweb: Include a site name in page titles
gitweb: Include a site name in page titles

This helps users tell one 'git' bookmark apart from the other in their
browser and improves the indexing of gitweb sites in Web search engines.
The title defaults to the SERVER_NAME environment variable, often given
by the webserver.

Signed-off-by: Alp Toker <20c272f1efc3df2c1049a6c6defb810061fc7aa9@atoker.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