#3 Content-Disposition header partial support

[Mike Rowehl]

Checks to see if there's a content-disposition header
with a suggested filename, and uses that for the box
rename instead of the URL path. Lots of plucker and
DOC book sites end up with urls that contain just a
bunch of arguments (ie.
http://dave.pluckerbooks.com:81/?action=fetch&format=pdb&id=1969\)
and don't contain info about the title at all. This
should really check the filename suggested before
attempting to use it.

[Mike Rowehl]

Patch modifies just lobrowz.c

[Frederick Lee]

Logged In: YES
user_id=36128

Reviewed and committed to CVS as-is.