Move struct nettle_mac to nettle-meta.h.

ChangeLog

+2020-02-09  Niels Möller  <nisse@lysator.liu.se>
+
+	* nettle-meta.h (struct nettle_mac): New public struct,
+	* testsuite/testutils.h: ...moved from this file.
+
 2020-02-06  Niels Möller  <nisse@lysator.liu.se>
 
 	From Dmitry Baryshkov:

nettle-meta.h

@@ -144,6 +144,24 @@ extern const struct nettle_hash nettle_sha3_256;
 extern const struct nettle_hash nettle_sha3_384;
 extern const struct nettle_hash nettle_sha3_512;
 
+struct nettle_mac
+{
+  const char *name;
+
+  /* Size of the context struct */
+  unsigned context_size;
+
+  /* Size of digests */
+  unsigned digest_size;
+
+  /* Key size */
+  unsigned key_size;
+
+  nettle_set_key_func *set_key;
+  nettle_hash_update_func *update;
+  nettle_hash_digest_func *digest;
+};
+
 struct nettle_aead
 {
   const char *name;

testsuite/testutils.h

@@ -79,25 +79,6 @@ test_main(void);
 
 extern int verbose;
 
-/* FIXME: When interface stabilizes, move to nettle-meta.h */
-struct nettle_mac
-{
-  const char *name;
-
-  /* Size of the context struct */
-  unsigned context_size;
-
-  /* Size of digests */
-  unsigned digest_size;
-
-  /* Suggested key size; other sizes are sometimes possible. */
-  unsigned key_size;
-  
-  nettle_set_key_func *set_key;
-  nettle_hash_update_func *update;
-  nettle_hash_digest_func *digest;
-};
-
 #define _NETTLE_HMAC(name, NAME, keysize) {	\
   #name,					\
   sizeof(struct hmac_##name##_ctx),		\