libX11 updated, fvwm, etc., hangs perhaps fixed now

hi folks.


the newly released libX11 1.8.2 claims to fix issues in fvwm,
xfce, and some motif stuff, related to hanging because of the
thread safety changes.

i know some problems were fixed, but this should now make the
old binaries work again.  i've merged into -current.

if you have something still problematic, or have been avoiding
using old binaries, it would be great to hear things work for
you again now.

thanks.


.mrg.