[Patches] signal module patch for GNU pth support

[Andy Dustman]

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Since GNU pth runs in user-space in a single process, (getpid() ==
main_pid) is always true, and so signal_handler check the thread id and
use pth_raise() to send the signal to the main thread if another thread
was running when the signal arrived.

NOTE: pth-1.3.5 currently has a bug (IMHO) in that pth_sleep()
(replacement for POSIX sleep()) is not awakened by signals. The severity
of the bug depends on how long you were sleeping... This has been
reported.

-- 
andy dustman       |     programmer/analyst     |      comstar.net, inc.
telephone: 770.485.6025 / 706.549.7689 | icq: 32922760 | pgp: 0xc72f3f1d
"Therefore, sweet knights, if you may doubt your strength or courage, 
come no further, for death awaits you all, with nasty, big, pointy teeth!"

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