Unnecessarily strict regex was failing for some unknown reason on OS X. Easier to just relax the regex than understand what's wrong (and then relax the regex).
Fixes#782
This generates the scripts that lets bash do completion per specific tool.
It gets the options from the documentation XML files that are also the
source for the man pages and HTML.
Michael Ansel
Doug Engert
Frank Morgner
Hans-Christoph Steiner
Peter Marschall