Zeroconf

- Make decode errors more helpful in finding the source of the bad
data (\1052) bdraco

- Improve performance of query scheduler (\1043) bdraco
- Avoid linear type searches in ServiceBrowsers (\1044) bdraco

- Handle Service types that end with another service type (\1041)
apworks1

Backwards incompatible:

- Dropped Python 3.6 support (\1009) bdraco

Technically backwards incompatible:

- Adding a listener that does not inherit from RecordUpdateListener
now logs an error (\1034) bdraco

- The NotRunningException exception is now thrown when Zeroconf is not
running (\1033) bdraco

Before this change the consumer would get a timeout or an
EventLoopBlocked exception when calling
<span class="title-ref">ServiceInfo.\*request</span> when the
instance had already been shutdown or had failed to startup.

- The EventLoopBlocked exception is now thrown when a coroutine times
out (\1032) bdraco

Previously
<span class="title-ref">concurrent.futures.TimeoutError</span> would
have been raised instead. This is never expected to happen during
normal operation.

- Unavailable interfaces are now skipped during socket bind (\1028)
bdraco

- Downgraded incoming corrupt packet logging to debug (\1029) bdraco

Warning about network traffic we have no control over is confusing
to users as they think there is something wrong with zeroconf