+- para_afh: New option: --preserve to reset the modification time to
+ the value of the original file after meta data modification.
+- Overhaul of the compress filter code. The refined algorithm should
+ reduce clipping. The meaning of --aggressiveness has changed, see the
+ updated and extended documentation of the compress filter for details.
+- Cleanup of the audio format handler code.
+- We now build the tree using the .ONESHELL feature of GNU make,
+ which results in a significant speedup.
+- Two robustness fixes for FreeBSD.
+