[CM] Snd 23.0

[bil at ccrma.Stanford.EDU]

Snd 23.0:

In Snd, drag and drop can handle "percent-encoded" file names,
   thanks to Tito Latini.

In clm, Orm Finnendahl got Juan Pampin's ATS system running:
   https://github.com/ormf/cl-ats.

In s7: reverted s7.h to previous version; use tools/s7.def instead.


checked: Ubuntu 22.10 (gcc 12.2.0), sbcl 2.2.11|2.3.0

Thanks!: Rudolf Adamkovic, Tito Latini, Iohannes zmoelnig, jingkaimori