Merged r11932 from trunk to 2.3-stable (#14221)

translate x_hours in many languages.

Contributed by Filou Centrinov.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/branches/2.3-stable@11935 e93f8b46-1217-0410-a6f0-8f06a7374b81