Unified the redirect matching being done for prior versions.

Updated the .htaccess file to show the same consistency for
different versions of OpenStack that are no longer supported -
specifically updating the bexar/cactus/diablo releases which were
previously only redirecting to the /trunk/ directory.

Change-Id: I844e1fbee4542a0d230a2bbf4e70963d1e626316
Merge "Unified the redirect matching being done for prior versions."