v1.8.4-20221008

This release contains code to enable use of 2020C mode, which is an experimental mode that may or may not improve standard 2020 and 2020B modes. Note that this mode may get significantly modified or even removed before official release.

Changes since the previous prerelease build:

1. Build system:
   • Updates to reflect LPCNet decoupling from Codec2 (PR #274)
2. Bugfixes:
   • Add missed UI disable on startup for 2020B mode. (PR #279)
3. Enhancements:
   • Add alternate method of determining 2020 support for non-x86 machines. (PR #280)
   • Remove unnecessary BW and DPSK options from UI. (PR #283)
   • Stats on left hand side of main window now auto-reset after user-configurable time period (default 10s). (PR #262, #286)