Comment 3 for bug 1247448

I'm going to add a new INKSCAPE_PROFILE_DIR in Inkscape and document it in the man page, and keep INKSCAPE_PORTABLE_PROFILE_DIR in the code (not documented in the man).

Note that INKSCAPE_PORTABLE_PROFILE_DIR also disables changes to the Windows registry, and thus can't be replaced with the new generic user profile directory env.