[Mimedefang] BUG: filter_bad_filename doesn't expect a space

[Jay Levitt]

The following line in mimedefang-filter:

    $re = '\.' . $bad_exts . '\.*([^-A-Za-z0-9_.,]|$)';

will improperly match this filename (not including the quotes):

"test.com example.txt"

because "space" is not one of the characters listed in the "I'm done with
this filename" character class, so it believes the extension is ".com".

Jay Levitt