Log Message:
Update to OpenLDAP 2.4.21, now the "stable" release.

OpenLDAP 2.4.21 Release (2009/12/20)
	Fixed liblutil for negative microsecond offsets (ITS#6405)
	Fixed slapd global settings to work without restart (ITS#6428)
	Fixed slapd looping with SSL/TLS connections (ITS#6412)
	Fixed slapd syncrepl freeing tasks from queue (ITS#6413)
	Fixed slapd syncrepl parsing of tls defaults (ITS#6419)
	Fixed slapd syncrepl uninitialized variables (ITS#6425)
	Fixed slapd-config Adds with Abstract classes (ITS#6408)
	Fixed slapo-dynlist behavior with simple filters (ITS#6421)
	Fixed slapd-ldif access outside database directory (ITS#6414)
	Fixed slapd-null extraneous assert (ITS#6403)
	Fixed slapo-translucent with back-null (ITS#6403)
	Fixed slapo-unique criteria checking (ITS#6270)
	Build Environment
		Deleted broken LBER_INVALID macro (ITS#6402)
		Fixed test058 kill usage (ITS#6420)
		Fixed meta regression test (ITS#6418)
	Documentation
		slapd-meta(5) Note deprecated functions (ITS#6424)
		admin24 fix set example for group of groups (ITS#6382)
		admin24 fix dynamic group documentation (ITS#6290)

OpenLDAP 2.4.20 Release (2009/11/27)
	Fixed client tools with LDAP options (ITS#6283)
	Fixed liblber embedded NUL values in BerValues (ITS#6353)
	Fixed liblber inverted LBER_USE_DER test (ITS#6348)
	Fixed liblber to return failure on certain failures (ITS#6344)
	Fixed libldap connection initialization (ITS#6386)
	Fixed libldap sasl buffer sizing (ITS#6327,ITS#6334)
	Fixed libldap uninitialized return value (ITS#6355)
	Fixed libldap unlimited timeout (ITS#6388)
	Added slapd handling of hex server IDs (ITS#6297)
	Added slapd syncrepl contextCSN storing in subentry (ITS#6373)
	Fixed slapd asserts in minimal environment (ITS#6361)
	Fixed slapd authid-rewrite parsing (ITS#6392)
	Fixed slapd checks of str2filter (ITS#6391)
	Fixed slapd configArgs initialization (ITS#6363)
	Fixed slapd debug handling of LDAP_DEBUG_ANY (ITS#6324)
	Fixed slapd db_open with connection_fake_init (ITS#6381)
	Fixed slapd with embedded \0 in bervals (ITS#6378,ITS#6379)
	Fixed slapd inclusion of ac/unistd.h (ITS#6342)
	Fixed slapd invalid dn log message (ITS#6309)
	Fixed slapd lockup on shutdown (ITS#6372)
	Fixed slapd onetime leak (ITS#6398)
	Fixed slapd RID range to be decimal only (ITS#6394)
	Fixed slapd sl_free to better reclaim memory (ITS#6380)
	Fixed slapd syncrepl deletes in MirrorMode (ITS#6368)
	Fixed slapd syncrepl to use correct SID (ITS#6367)
	Fixed slapd termination for one level DNs (ITS#6338)
	Fixed slapd tls_accept to retry in certain cases (ITS#6304)
	Fixed slapd-bdb/hdb cache corruption (ITS#6341)
	Fixed slapd-bdb/hdb entry cache (ITS#6360)
	Fixed slapd-ldap leak (ITS#6326)
	Fixed slapd-relay bind segfault (ITS#6337)
	Fixed slapo-accesslog ensure CSNs are normalized (ITS#6400)
	Fixed slapo-memberof operational attr updates (ITS#6329)
	Fixed slapo-pcache entry dupe (ITS#6310)
	Fixed slapo-syncprov checkpoint conversion (ITS#6370)
	Fixed slapo-syncprov deadlock (ITS#6335)
	Fixed slapo-syncprov memory leak (ITS#6376)
	Fixed slapo-syncprov out of order changes (ITS#6346)
	Fixed slapo-syncprov psearch with stale cookie (ITS#6397)
	Build Environment
		Added additional operations for ITS#6332
		Fixed memrchr define (ITS#6351)
		Fixed slapd MAXPATHLEN handling (ITS#6342)
		Added test050 rapid add/mod/del sequence (ITS#6368)
		Fixed test057 handling of memberof/refint (ITS#6343)
		Fixed slapd test error ignoring (ITS#6345)
		Fixed liblutil constant (ITS#5909)
	Documentation
		admin24 fix RFC4511 and other references (ITS#6399)
		ldap_get_dn(3) typos (ITS#5366)
		ldap.conf(5) clarify comment usage (ITS#6384)
		slapd.conf(5) note hex server IDs (ITS#6297)
		slapd-config(5) note hex server IDs (ITS#6297)