Add back_bdb to modules

servers/slapd/slapd.conf

@@ -16,6 +16,7 @@ argsfile	%LOCALSTATEDIR%/slapd.args
 
 # Load dynamic backend modules:
 # modulepath	%MODULEDIR%
+# moduleload	back_bdb.la
 # moduleload	back_ldap.la
 # moduleload	back_ldbm.la
 # moduleload	back_passwd.la