oid: `hashcmp` is now `raw_cmp`

We will talk about "raw" oids as untyped blobs of data; use a name for
the comparison function that is in keeping with that.

src/libgit2/commit_graph.c

@@ -147,10 +147,10 @@ static int commit_graph_parse_oid_lookup(
 	if (chunk_oid_lookup->length != file->num_commits * GIT_OID_RAWSZ)
 		return commit_graph_error("OID Lookup chunk has wrong length");
 
-	file->oid_lookup = oid = (git_oid *)(data + chunk_oid_lookup->offset);
+	file->oid_lookup = oid = (git_oid_raw *)(data + chunk_oid_lookup->offset);
 	prev_oid = &zero_oid;
 	for (i = 0; i < file->num_commits; ++i, ++oid) {
-		if (git_oid_cmp(prev_oid, oid) >= 0)
+		if (git_oid_raw_cmp(prev_oid, oid) >= 0)
 			return commit_graph_error("OID Lookup index is non-monotonic");
 		prev_oid = oid;
 	}

src/libgit2/oid.h

@@ -25,7 +25,9 @@ extern const git_oid git_oid__empty_tree_sha1;
  */
 char *git_oid_allocfmt(const git_oid *id);
 
-GIT_INLINE(int) git_oid__hashcmp(const unsigned char *sha1, const unsigned char *sha2)
+GIT_INLINE(int) git_oid_raw_cmp(
+	const unsigned char *sha1,
+	const unsigned char *sha2)
 {
 	return memcmp(sha1, sha2, GIT_OID_RAWSZ);
 }
@@ -39,7 +41,7 @@ GIT_INLINE(int) git_oid__hashcmp(const unsigned char *sha1, const unsigned char
  */
 GIT_INLINE(int) git_oid__cmp(const git_oid *a, const git_oid *b)
 {
-	return git_oid__hashcmp(a->id, b->id);
+	return git_oid_raw_cmp(a->id, b->id);
 }
 
 GIT_INLINE(void) git_oid__cpy_prefix(

src/libgit2/pack.c

@@ -1451,7 +1451,7 @@ int git_pack__lookup_sha1(const void *oid_lookup_table, size_t stride, unsigned
 
 	while (lo < hi) {
 		unsigned mi = (lo + hi) / 2;
-		int cmp = git_oid__hashcmp(base + mi * stride, oid_prefix);
+		int cmp = git_oid_raw_cmp(base + mi * stride, oid_prefix);
 
 		if (!cmp)
 			return mi;