Minor cleanups to other patches.
Make --temp-pool default


Docs/manual.texi:
  Changelog
configure.in:
  Fix for Intel compiler (ecc)
include/my_global.h:
  Cleaned up QNX specific code.
include/my_pthread.h:
  Safety
include/my_semaphore.h:
  Cleaned up BSDI fix.
mysys/my_pthread.c:
  Code comments
mysys/my_semaphore.c:
  Fix for BSDI
sql/mysqld.cc:
  Make --temp-pool default
sql/sql_parse.cc:
  Safety