Replace system() function with fork and execl call.
This is much more selinux friendly as it allows policy makers to call
nscd_domtrans to transition to nscd_t instead of giving more access to
the system via the corcmd_exec_bin macro.
Modified-by: Simo Sorce <ssorce@redhat.com>
Signed-off-by: Simo Sorce <ssorce@redhat.com>