Merge branch 'nd/resolve-ref'

* nd/resolve-ref:
  Rename resolve_ref() to resolve_ref_unsafe()
  Convert resolve_ref+xstrdup to new resolve_refdup function
  revert: convert resolve_ref() to read_ref_full()

branch.c

@@ -181,7 +181,7 @@ int validate_new_branchname(const char *name, struct strbuf *ref,
 		const char *head;
 		unsigned char sha1[20];
 
-		head = resolve_ref("HEAD", sha1, 0, NULL);
+		head = resolve_ref_unsafe("HEAD", sha1, 0, NULL);
 		if (!is_bare_repository() && head && !strcmp(head, ref->buf))
 			die("Cannot force update the current branch.");
 	}