branch: Change git_branch_delete to take a ref

include/git2/branch.h

@@ -55,21 +55,11 @@ GIT_EXTERN(int) git_branch_create(
 /**
  * Delete an existing branch reference.
  *
- * @param repo Repository where lives the branch.
+ * @param branch A valid reference representing a branch
  *
- * @param branch_name Name of the branch to be deleted;
- * this name is validated for consistency.
- *
- * @param branch_type Type of the considered branch. This should
- * be valued with either GIT_BRANCH_LOCAL or GIT_BRANCH_REMOTE.
- *
- * @return 0 on success, GIT_ENOTFOUND if the branch
- * doesn't exist or an error code.
+ * @return 0 on success, or an error code.
  */
-GIT_EXTERN(int) git_branch_delete(
-		git_repository *repo,
-		const char *branch_name,
-		git_branch_t branch_type);
+GIT_EXTERN(int) git_branch_delete(git_reference *branch);
 
 /**
  * Loop over all the branches and issue a callback for each one.

include/git2/refs.h

@@ -376,6 +376,16 @@ GIT_EXTERN(int) git_reference_has_log(git_reference *ref);
  */
 GIT_EXTERN(int) git_reference_is_branch(git_reference *ref);
 
+/**
+ * Check if a reference is a remote tracking branch
+ *
+ * @param ref A git reference
+ *
+ * @return 1 when the reference lives in the refs/remotes
+ * namespace; 0 otherwise.
+ */
+GIT_EXTERN(int) git_reference_is_remote(git_reference *ref);
+
 /** @} */
 GIT_END_DECL
 #endif