Update.

	Implement paranoia mode.
	* nscd/connections.c (nscd_init): Mark database and socket descriptors
	as close on exec.
	(restart): New function.
	(restart_p): New function.
	(nscd_run): Add missing descrement of nready in case readylist is
	empty.
	(main_loop_poll): Call restart_p and restart.
	(main_loop_epoll): Likewise.
	(begin_drop_privileges): Save original UID and GID.
	* nscd/nscd.c: Define new variables paranoia, restart_time,
	restart_interval, oldcwd, old_gid, old_uid.
	(main): Disable paranoia mode if we are not forking.
	(check_pid): When re-execing, the PID file contains the same PID as
	the current process.  Do not fail in this case.
	* nscd/nscd.conf: Add paranoia and restart-interval entries.
	* nscd/nscd.h: Define RESTART_INTERVAL.  Declare new variables.
	* nscd/nscd_conf.c: Parse paranoia and restart-internal configurations.
	* nscd/nscd_stat.c: Print paranoia and restart-internal values.

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