it may be present but not implemented. Add sudo_gettime_real() and
sudo_gettime_mono() functions to get the real and monotonic times
respectively. Now sudo_gettime_mono() checks the value of
sysconf(_SC_MONOTONIC_CLOCK) before calling clock_gettime(CLOCK_MONOTONIC)
and falls back on sudo_gettime_real() as needed. The Mach version
of sudo_gettime_mono() uses mach_absolute_time().
This should fix problems with timestamp files on systems where
the CLOCK_MONOTONIC is defined but not actually implemented.
modern OSes. If sysconf(_SC_OPEN_MAX) ever fails, fall back on
_POSIX_OPEN_MAX instead. We can assume modern systems have sysconf().
Also remove checks for strrchr() and strtoll() for which the HAVE_*
defines are no longer used.
Fixes a problem on Solaris where undefined functions that are listed
as exported in the map file result in a link error.
Also make sure we use our glob.c if the system is missing glob().
