member variables needed in curl wrapper class

[Mike Miller]

John,

I noticed your recent changes to the url handling code backed out a
change I had made some months ago:

http://hg.savannah.gnu.org/hgweb/octave/rev/81fe6665ed3c

I plan to essentially reapply this patch to the new base class. Should
I add a comment to the member variable declaration explaining why they
should be stored in the class?

Thanks,

-- 
mike