mutt-1.5.23 (updated formula)

- Added sidebar-patch
- Fixed broken urls for existing patches and updated trash-folder patch
- Fixed provided `configure` script failing with hard-dependency on
  automake-1.13 (uses `prepare` to regenerate new `configure` script)
mutt-1.5.23 (updated formula)

- removed revision line
- removed sidebar patch
mutt: update 1.5.23 bottle.