9842 man page typos and spelling

*** 284,294 ****
  \fBpthread_mutex_setprioceiling()\fR    \fB-\fR \fB-\fR
  \fBpthread_mutex_getprioceiling()\fR    \fB-\fR \fB-\fR
  \fBpthread_mutex_lock()\fR      \fBmutex_lock()\fR      \fBmtx_lock()\fR
  \fBpthread_mutex_timedlock()\fR \fB-\fR \fBmtx_timedlock()\fR
  \fBpthread_mutex_trylock()\fR   \fBmutex_trylock()\fR   \fBmtx_trylock()\fR
! \fBpthread_mutex_unlock()\fR    \fBmutex_unlock()\fR    \fBmtx_unlcok()\fR
  \fBpthread_mutex_destroy()\fR   \fBmutex_destroy()\fR   \fBmtx_destroy()\fR
  .TE
  
  .SS "Functions Related to Condition Variables"
  
--- 284,294 ----
  \fBpthread_mutex_setprioceiling()\fR    \fB-\fR \fB-\fR
  \fBpthread_mutex_getprioceiling()\fR    \fB-\fR \fB-\fR
  \fBpthread_mutex_lock()\fR      \fBmutex_lock()\fR      \fBmtx_lock()\fR
  \fBpthread_mutex_timedlock()\fR \fB-\fR \fBmtx_timedlock()\fR
  \fBpthread_mutex_trylock()\fR   \fBmutex_trylock()\fR   \fBmtx_trylock()\fR
! \fBpthread_mutex_unlock()\fR    \fBmutex_unlock()\fR    \fBmtx_unlock()\fR
  \fBpthread_mutex_destroy()\fR   \fBmutex_destroy()\fR   \fBmtx_destroy()\fR
  .TE
  
  .SS "Functions Related to Condition Variables"