Adopt BaseTcpServerHandler within HttpProtocolHandler (#681)

* Rename .server to .upstream

* Lint fixes

* Mark internal methods with _ prefix

* Fix broken test

* lint changes

* Wah, double client :D

* Avoid selector initialization for threadless mode

* remove unused imports

* Now HttpProtocolHandler implements BaseTcpServerHandler

* Consistent return and guard againt upstream.closed

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* AcceptorPool as context manager

* Group multiprocessing imports together

* Use com.jaxl bundle identifier as proxy.py will eventually move under jaxl org

* revisit devtools integration :)

* Emit all necessary events for devtools integration

* Lint fixes

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: abhinavsingh

Makefile

@@ -98,7 +98,7 @@ lib-release: lib-package
 	twine upload dist/*
 
 lib-coverage:
-	pytest --cov=proxy --cov-report=html tests/
+	pytest --cov=proxy --cov=tests --cov-report=html tests/
 	open htmlcov/index.html
 
 lib-profile: