From RedHat's patch shadow-4.1.2-sysAccountDownhill.patch

	From RedHat's patch shadow-4.1.2-sysAccountDownhill.patch
	Thanks to Peter Vrabec.
	* NEWS, libmisc/find_new_gid.c, libmisc/find_new_uid.c: Build an
	index of used IDs to avoid a database request for each id in the
	allowed range (when the highest allowed ID is already used).
	This speedups the addition of users or groups when the highest
	allowed ID is already used. The additional memory usage of the
	tools should be acceptable when UID_MAX/SYS_UID_MAX are set to a
	reasonable number.