temporary fix to ITS#5154

CHANGES

@@ -7,7 +7,8 @@ OpenLDAP 2.3.39 Engineering
 	Fixed slapd ACL sets memory handling (ITS#4873)
 	Fixed slapd ordered values add normalization issue (ITS#5136)
 	Fixed slapd-bdb DB_CONFIG conversion bug (ITS#5118)
-	Fixed slapd-ldap SASL idassert w/o autchId
+	Fixed slapd-ldap SASL idassert w/o authcId
+	Fixed slapd-meta conn caching on bind failure (ITS#5154)
 	Fixed slapd-sql concurrency issue (ITS#5095)
 	Fixed slapo-chain double-free (ITS#5137)
 	Fixed slapo-pcache and -rwm interaction fix (ITS#4991) 

servers/slapd/back-meta/bind.c

@@ -189,6 +189,10 @@ meta_back_bind( Operation *op, SlapReply *rs )
 
 		if ( lerr != LDAP_SUCCESS ) {
 			rc = rs->sr_err = lerr;
+			/* Mark the meta_conn struct as tainted so
+			 * it'll be freed by meta_conn_back_destroy below */
+			LDAP_BACK_CONN_TAINTED_SET( mc );
+
 			/* FIXME: in some cases (e.g. unavailable)
 			 * do not assume it's not candidate; rather
 			 * mark this as an error to be eventually