Merge branch 'jk/unused-annotation'

Annotate function parameters that are not used (but cannot be
removed for structural reasons), to prepare us to later compile
with -Wunused warning turned on.

* jk/unused-annotation:
  is_path_owned_by_current_uid(): mark "report" parameter as unused
  run-command: mark unused async callback parameters
  mark unused read_tree_recursive() callback parameters
  hashmap: mark unused callback parameters
  config: mark unused callback parameters
  streaming: mark unused virtual method parameters
  transport: mark bundle transport_options as unused
  refs: mark unused virtual method parameters
  refs: mark unused reflog callback parameters
  refs: mark unused each_ref_fn parameters
  git-compat-util: add UNUSED macro

log-tree.c

@@ -135,7 +135,8 @@ static int ref_filter_match(const char *refname,
 }
 
 static int add_ref_decoration(const char *refname, const struct object_id *oid,
-			      int flags, void *cb_data)
+			      int UNUSED(flags),
+			      void *cb_data)
 {
 	int i;
 	struct object *obj;