gitweb: Add link to the manual page

Signed-off-by: Veiko Aasa <veiko17@disroot.org>
Reviewed-by: Sunil Mohan Adapa <sunil@medhas.org>

plinth/modules/gitweb/__init__.py

@@ -59,6 +59,8 @@ description = [
       '<a href="https://git-scm.com/docs/gittutorial">Git tutorial</a>.')
 ]
 
+manual_page = 'GitWeb'
+
 group = ('git-access', _('Read-write access to Git repositories'))
 
 app = None

plinth/modules/gitweb/views.py

@@ -44,6 +44,7 @@ class GitwebAppView(views.AppView):
     show_status_block = False
     template_name = 'gitweb_configure.html'
     icon_filename = gitweb.icon_filename
+    manual_page = gitweb.manual_page
 
     def get_context_data(self, *args, **kwargs):
         """Add repositories to the context data."""