ITS#6398 fix onetime leak

CHANGES

@@ -21,6 +21,7 @@ OpenLDAP 2.4.20 Engineering
 	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)

servers/slapd/slapcommon.c

@@ -763,6 +763,11 @@ startup:;
 		conffile = NULL;
 	}
 
+	if ( confdir != NULL ) {
+		ch_free( confdir );
+		confdir = NULL;
+	}
+
 	if ( ldiffile != NULL ) {
 		ch_free( ldiffile );
 		ldiffile = NULL;