* doc/README.sgi (4): Fix a typo ("pthread_cond_timedwait").
include gc.h. Gc.h redefines some of the pthread primitives as macros which
also provide the collector with information it requires.
-4) pthread_cond_wait and pthread_cond_timed_wait should be prepared for
+4) pthread_cond_wait and pthread_cond_timedwait should be prepared for
premature wakeups. (I believe the pthreads and related standards require this
anyway. Irix pthreads often terminate a wait if a signal arrives.
The garbage collector uses signals to stop threads.)