Merge branch 'maint'

* maint:
  gitweb: Check git base URLs before generating URL from it
  Documentation: add git in /etc/services.
  Documentation: add upload-archive service to git-daemon.
  git-cherry: document limit and add diagram
  diff-format.txt: Correct information about pathnames quoting in patch format

gitweb/gitweb.perl

@@ -80,7 +80,7 @@ our $strict_export = "++GITWEB_STRICT_EXPORT++";
 
 # list of git base URLs used for URL to where fetch project from,
 # i.e. full URL is "$git_base_url/$project"
-our @git_base_url_list = ("++GITWEB_BASE_URL++");
+our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 
 # default blob_plain mimetype and default charset for text/plain blob
 our $default_blob_plain_mimetype = 'text/plain';