Add a template context processor that sets link_root on all secure requests,

so that we can generate proper linkbacks to the non-secure version of the
site for all static content.

pgweb/util/contexts.py

@@ -1,4 +1,5 @@
 from django.template import RequestContext
+from django.conf import settings
 
 # This is the whole site navigation structure. Stick in a smarter file?
 sitenav = {
@@ -88,3 +89,13 @@ class NavContext(RequestContext):
 			navsection = {}
 		self.update({'navmenu': navsection})
 
+
+# Template context processor to add information about the root link
+def RootLinkContextProcessor(request):
+	if request.is_secure():
+		return {
+			'link_root': settings.SITE_ROOT,
+		}
+	else:
+		return {}
+