Merge branch 'ik/gitweb-force-highlight'

"gitweb" can spawn "highlight" to show blob contents with (programming) language-specific syntax highlighting, but only when the language is known. "highlight" can however be told to make the guess itself by giving it "--force" option, which has been enabled. * ik/gitweb-force-highlight: gitweb: use highlight's shebang detection gitweb: remove unused guess_file_syntax() parameter