Remove NDBM from list of support LDBM API options

CHANGES

@@ -4,6 +4,8 @@ Changes included in OpenLDAP 1.2.10 Release Engineering
 	CVS Tag: OPENLDAP_REL_ENG_1_2
 	Add slapd -DSLAPD_UNDEFINED_OC_IS_NOT_EXTENSIBLE macro disable
 		undefined object classes implies extensible object behavior.
+	Build Environment
+		Do no list unsupported LDBM API option NDBM
 
 Changes included in OpenLDAP 1.2.9
 	CVS Tag: OPENLDAP_REL_ENG_1_2_9

configure

@@ -1388,7 +1388,7 @@ if test "${with_ldbm_api+set}" = set; then
   withval="$with_ldbm_api"
   
 	ol_arg=invalid
-	for ol_val in auto db2 db mdbm gdbm ndbm manual ; do
+	for ol_val in auto db2 db mdbm gdbm manual ; do
 		if test "$withval" = "$ol_val" ; then
 			ol_arg="$ol_val"
 		fi

configure.in

@@ -81,7 +81,7 @@ OL_ARG_ENABLE(rlookups,[    --enable-rlookups	enable reverse lookups], auto)dnl
 dnl SLAPD Backend options
 OL_ARG_ENABLE(ldbm,[    --enable-ldbm	enable ldbm backend], yes)dnl
 OL_ARG_WITH(ldbm_api,[      --with-ldbm-api	use LDBM API], auto,
-	[auto db2 db mdbm gdbm ndbm manual])
+	[auto db2 db mdbm gdbm manual])
 OL_ARG_WITH(ldbm_type,[      --with-ldbm-type	use LDBM type], auto,
 	[auto btree hash])