We have a webdav account on a server hosted by our ISP.   It works
great under windows, but isn’t working very well on Mac OS9.

1 - 
What is the best Mac OS9 program for accessing WebDav servers?   I
know there exists Goliath, and DAV.   http://www.webdav.org/goliath/  
Maybe more.   One useful link is http://www.webdav.org.   One of the
servers we are currently using uses encrypted (non cleartext)
passwords and consequently isn’t working with it, or at least we
couldn’t figure it out.

2 -
The other server is apparently different, it uses work over HTTP and
uses SSL (with a certificate) and I guess this means that is won’t
have that problem.

I’m not sure if I understand the difference between the two.  I though
all webdav was over http.

Maybe you could explain.

3 –
I read on webdav.org that ical support webdav? 
http://www.apple.com/ical/
What gives?  iCal isn't for file sharing!  I am assuming that it just
happens to work with a webdav server, and offers no provision for
accessing normal files on that server.   OX10 (jaguar) should do this
by itself.  Is this assumption correct?

4 – 
Does Jaguar support encrypted passwords, or just cleartext (the old
ver of OSX was just cleartext)?