V4.9.2 (#482) * Late-import base36 and QR code libraries; remove SUPPORT_QR_CODE flag * Increase idle connection check interval to 300s (#475) This check was creating a lot of TimerHandles when the user had multiple bridges. We do not need to check very often as connections usually stay around for 24+hours * Implement zerocopy writes for the encrypted protocol (#476) * Implement zerocopy writes for the encrypted protocol With Python 3.12+ and later `transport.writelines` is implemented as [`sendmsg(..., IOV_MAX)`](https://github.com/python/cpython/issues/91166) which allows us to avoid joining the bytes and sending them in one go. Older Python will effectively do the same thing we do now `b"".join(...)` * update tests * Revert "Late-import base36 and QR code libraries; remove SUPPORT_QR_CODE flag" (#477) * Avoid os.chmod failing on Windows if file non-existant (#471) * Avoid os.chmod failing on Windows if file non-existant * Update accessory_driver.py --------- Co-authored-by: Ivan Kalchev <[email protected]> * Fix mdns tests (#478) * Fix pylint complaints (#480) * Address remaining pylint complaints (#481) * Address remaining pylint complaints * Address remaining pylint complaints * v4.9.2 --------- Co-authored-by: Aarni Koskela <[email protected]> Co-authored-by: J. Nick Koston <[email protected]> Co-authored-by: Perry Kundert <[email protected]> Co-authored-by: Ivan Kalchev <[email protected]>