Add compression support to lower Python/Cython layers

Tiny fix to check_include_guards script

Add an explicit base class pointer to avoid potential breakage.

Fixed compression interop and re-enable for C++.

grpc-accept-encoding checks

Updated functions with TSRM macros for ZTS support

Fix leak in port deallocation

Perf script improvements

Let execution contexts signal that they are done

Break PARALLELISM test constant in two

Reworked python health checking and added tests

Allow for multiline #endif guards

Fixed usage of anon namespace inside .h

Fix accelerated wakeups

"sooner" -> "server" typo correction

use LANG_ENGLISH for windows api FormatMessage

Add a grpc_recycle_unused_port to return pick_unused_port ports to the portserver

"... will not have the effect of stopping the sooner later", heh. :-P

We can end up in situations where a pollset needs to kick itself.

This is supposed to be an accelerated codepath, however a bug crept in
whereby we missed the opportunity to do so, resulting in needing to
round trip these wakeups redundantly through the OS and wake other
threads unnecessarily.