Reverted r10184 (#9365).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@10186 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/helpers/application_helper.rb

@@ -1134,7 +1134,7 @@ module ApplicationHelper
   # +user+ can be a User or a string that will be scanned for an email address (eg. 'joe <joe@foo.bar>')
   def avatar(user, options = { })
     if Setting.gravatar_enabled?
-      options.merge!({:ssl => (Setting.protocol == 'https'), :default => Setting.gravatar_default})
+      options.merge!({:ssl => (request && request.ssl?), :default => Setting.gravatar_default})
       email = nil
       if user.respond_to?(:mail)
         email = user.mail