Added DNS resolver configuration option.

src/config.h

 
 /* @END isa.h */
 
+/* @BEGIN general.h
+ *
+ * Name resolution modules
+ *
+ */
+
+#define	DNS_RESOLVER		/* DNS resolver */
+
+/* @END general.h */
+
 /* @BEGIN general.h
  *
  * Obscure configuration options

src/core/config.c

 #ifdef RELOCATE
 REQUIRE_OBJECT ( relocate );
 #endif
+
+/*
+ * Drag in any required resolvers
+ *
+ */
+#ifdef DNS_RESOLVER
+REQUIRE_OBJECT ( dns_resolver );
+#endif