Merge from branch toggle-record-in-io

Rename to suppressRecordSide to clarify that the default is enabled; provide stub versions in other implementations

Fix small memory leak

Fix compiler warning

Tentative support for toggling record side of an IO

If the record target doesn't care about channel count, set it to the device count

The aforementioned merge happened

Take absolute value for peak!

I forgot these were currently only in a branch of bqresample - comment for the moment until later merge there

Make these parameters explicit

Ensure latency is reported to application in terms of the source sample rate, not the target one

Fix incorrect stream reference for record latency, resulting in crash when started in record-only mode

Fix crash when started in record-only mode

Fix typo in comment

Doc notes

Copyright dates

Fix uninitialised member

Remove vestigial includes from earlier debugging

Ensure the loop thread knows it should give other threads a chance, when awoken explicitly

Avoid compiler warnings (the semicolons were spurious)