hack to workaround opendnssec trying to use these constants for a
non-ldns-related purpose

Index: ldns/keys.h
--- ldns/keys.h.orig
+++ ldns/keys.h
@@ -94,10 +94,10 @@ enum ldns_enum_signing_algorithm
 	LDNS_SIGN_ECC_GOST       = LDNS_ECC_GOST,
         LDNS_SIGN_ECDSAP256SHA256 = LDNS_ECDSAP256SHA256,
         LDNS_SIGN_ECDSAP384SHA384 = LDNS_ECDSAP384SHA384,
-#if LDNS_BUILD_CONFIG_USE_ED25519
+#if LDNS_BUILD_CONFIG_USE_ED25519 || USE_ED25519
 	LDNS_SIGN_ED25519	 = LDNS_ED25519,
 #endif /* LDNS_BUILD_CONFIG_USE_ED25519 */
-#if LDNS_BUILD_CONFIG_USE_ED448
+#if LDNS_BUILD_CONFIG_USE_ED448 || USE_ED448
 	LDNS_SIGN_ED448		 = LDNS_ED448,
 #endif /* LDNS_BUILD_CONFIG_USE_ED448 */
 	LDNS_SIGN_HMACMD5	 = 157,	/* not official! This type is for TSIG, not DNSSEC */