Documentation updates

[Harold Hunt]

I updated the Cygwin/XFree86 FAQ to answer the question about the font path
with Solaris (Q 4.9):
http://xfree86.cygwin.com/docs/faq/cygwin-xfree-faq.html#q-solaris-fonts


I also added a Q/A for the slowdown caused by ATI2evxx.exe (Q 6.1):
http://xfree86.cygwin.com/docs/faq/cygwin-xfree-faq.html#q-tasklist-programs
-slow


In the User's Guide I added documentation for starting multiple XDMCP
sessions with different hosts:
http://xfree86.cygwin.com/docs/ug/using-remote-session.html


I gave attributions to Dr. Edward Wornar and David Dawson, so they will want
to look at these updates.

Harold