2.10.8 (stable)

Build:
* Meson build: Perl is not required by new versions of mm-common
  (Kjell Ahlstedt)
* NMake Makefiles: Support building with VS2022
  (Chun-wei Fan)

Documentation:
* Upgrade the manual from DocBook 4.1 to DocBook 5.0
  (Kjell Ahlstedt)