[openal] OpenAL Soft 1.20.1 released!

[Chris Robinson]

OpenAL Soft 1.20.1 is now available:

https://openal-soft.org/

A relatively small but still worthwhile update, adding some of the 
intended features mentioned last time as well as bugfixes and 
improvements. Notably, HRTFs are resampled on load as needed, so you 
don't need MHR files for specific device sample rates. There is also a 
new hrtf-size config option to limit the HRTF filter length, preventing 
it from being larger than desired.

Additionally, a potential internal voice leak was fixed, along with 
device reset errors with the JACK backend. The WASAPI backend has been 
improved to handle less-common speaker layouts too, so output 
configurations that previously wouldn't work will now try to get at 
least stereo output.

There are a couple new extensions to extend support for Direct Channels 
(remixing so input channels without a matching output aren't completely 
lost) and B-Format (to recognize ACN, SN3D, and N3D, in addition to 
FuMa). More information on that is here:

<https://openal-soft.org/openal-extensions/SOFT_direct_channels_remix.txt>
<https://openal-soft.org/openal-extensions/SOFT_bformat_ex.txt>

See the Changelog or the main page for a more complete list of changes.

Work is continuing on for the other bigger features mentioned last time. 
Please get in touch either here or via the GitHub issue tracker if you 
run into any problems, or have ideas for any planned or all-new 
features. Thanks!