Merge branch 'md/sort-detached-head-first'

"git branch --list" learned to always output the detached HEAD as
the first item (when the HEAD is detached, of course), regardless
of the locale.

* md/sort-detached-head-first:
  ref-filter: sort detached HEAD lines firstly

wt-status.h

@@ -65,6 +65,9 @@ enum wt_status_format {
 	STATUS_FORMAT_UNSPECIFIED
 };
 
+#define HEAD_DETACHED_AT _("HEAD detached at ")
+#define HEAD_DETACHED_FROM _("HEAD detached from ")
+
 struct wt_status_state {
 	int merge_in_progress;
 	int am_in_progress;