gitweb: Fix escaping HTML of project owner in 'projects_list' and

gitweb: Fix escaping HTML of project owner in 'projects_list' and
'summary' views

This for example allows to put email address in the project owner
field in the projects index file (when $projects_list points to
a file, and not to a directory), in the form of:

path/to/repo.git Random+J+Developer+<random@developer.example.org>

Noticed-by: Jon Smirl <jonsmirl@gmail.com>
Signed-off-by: Jakub Narebski <jnareb@gmail.com>
Signed-off-by: Petr Baudis <pasky@suse.cz>
Signed-off-by: Junio C Hamano <gitster@pobox.com>