Merge branch 'js/windows-dotgit'

On Windows, .git and optionally any files whose name starts with a
dot are now marked as hidden, with a core.hideDotFiles knob to
customize this behaviour.

* js/windows-dotgit:
  mingw: remove unnecessary definition
  mingw: introduce the 'core.hideDotFiles' setting

cache.h

@@ -701,6 +701,14 @@ extern int ref_paranoia;
 extern char comment_line_char;
 extern int auto_comment_line_char;
 
+/* Windows only */
+enum hide_dotfiles_type {
+	HIDE_DOTFILES_FALSE = 0,
+	HIDE_DOTFILES_TRUE,
+	HIDE_DOTFILES_DOTGITONLY
+};
+extern enum hide_dotfiles_type hide_dotfiles;
+
 enum branch_track {
 	BRANCH_TRACK_UNSPECIFIED = -1,
 	BRANCH_TRACK_NEVER = 0,