Changes 2.24.2:
* __uuid_generate_time()  report if clock_seq is safe
* do not use invalid file descriptor
* fix test in get_clock()
* get_clock()  report if the clock_seq is safe
* introduce uuid_generate_time_safe()
* manpage spelling fixes
* move __uuid function to UUIDD_PRIVATE in uuid.sym
* rename uuid__generate_* to __uuid_generate_*
* update manpage, mention uuid_generate_time_safe

(adam)