added sub-uri fix by amelentjev (redmine-git-hosting#472)

Author: Phiber2000

Diff for: lib/redmine_git_hosting/hooks/add_public_keys_link.rb

@@ -8,7 +8,7 @@ def view_my_account_contextual(context)
       end
 
       def self.default_url_options
-        {}
+        {:script_name => Redmine::Utils.relative_url_root}
       end
 
     end