Through the metadata's user data mechanism.

Remove failing globs from examples and tests

Simplify metadata usage

Revised the state machine.

Fix docs on gpr_slice_unref.

Fix docs on grpc_op_type.

include string_util.h for the prototype of gpr_strdup and fix a typo.

Fixes two warnings in log_win32.c under msvc2015
log_win32.c(109): warning C4013: 'gpr_strdup' undefined; assuming extern returning int
log_win32.c(109): warning C4047: 'return': 'char *' differs in levels of indirection from 'int'

and corrects a typo in an error message

Only keep docker containers for tests that failed

Add Connectivity doc

fetch PR refspec for docker jenkins builds

Fix native callback signature to match with C#

Speed up hash checks, crash on first TSAN error

Revamp of C# channel options (aka channel args)

Stability fixes for python_plugin_test

The "normal" timeout is eliminated. The "short" timeout is changed to
be the length used in tests that will time out as part of their
execution and the "long" timeout is changed to be a ridiculously high
value that will have no bearing on passing tests.

The "pause" behavior of _ServicerMethods is changed to use a
threading.Condition's wait/notify methods rather than busy-sleeping.

Tests that used servicer delay to verify that asynchronous calls are
not affected by server delay are changed to use servicer pause to
verify that asynchronous calls return while the servicer is paused.

Busy-sleeping in testHalfDuplexCallWedged is replaced with use of a
threading.Condition's wait/notify methods.

Fixes https://github.com/grpc/grpc/issues/1900.

Ensure C89 compatibility in Linux tests.