use a configdir other that ~/.netscape without having to do HOME environment
hacks.
Thanks to Aleksey Nogin (ayn2@cornell.edu) for doing all the work and being
patient for me to actually check the stuff in.
git-svn-id: svn://10.0.0.236/trunk@9113 18797224-902f-48f8-a5cc-f745e15eee43