Create feature file for NT build environment.

include/ldap_features.h.nt

+/* 
+ * LDAP Features
+ */
+#ifndef _LDAP_FEATURES_H
+#define _LDAP_FEATURES_H 1
+
+/* OpenLDAP Debug Support */
+#define LDAP_API_FEATURE_X_OPENLDAP_DEBUG LDAP_API_VENDOR_VERSION
+
+/* OpenLDAP v2 DNS */
+#define LDAP_API_FEATURE_X_OPENLDAP_V2_DNS LDAP_API_VENDOR_VERSION
+
+/* OpenLDAP v2 Referrals */
+#define LDAP_API_FEATURE_X_OPENLDAP_V2_REFERRALS LDAP_API_VENDOR_VERSION
+
+#endif /* LDAP_FEATURES */