20231122 cleanup
Cleanup; accept the following switches:
- 
FIX_643_PCA_OPTION- VA: issue 643: rename PCA bypass command-line option -> accept - 
FIX_899_VARIABLE_SPEED_DECODING- FhG: Fix variable speed decoding -> accept - 
NONBE_FIX_788_SBA_DTX_BR_SWITCHING- VA: issue 787: fix Msan error in SBA BR switching with dtx in FOA encoding -> accept - 
NONBE_FIX_874_OMASA_BRSW_2TD- Nokia: issue 874: Fixes the crashes with the long test vectors that prompted switching to TD -> accept - 
NONBE_FIX_225_MASA_EXT_REND- Nokia: Resolve #225: Complete MASA external renderer implementation -> accept - 
NONBE_FIX_897_USAN_WITH_MASA_RENDERING- Nokia: issue #897 (closed): USAN null pointer in MASA external renderer to Ambisonics -> accept - 
NONBE_FIX_811_DFT_DOUBLE_TO_FLOAT- FhG: issue 811: change double precision functions to float in DFT Stereo -> accept