* Use threads for delegation. Now `run_once` lock before `accept` not `select`
* Add support to use master proxy within proxy pool plugin. When used, proxy pool plugin will be a no-op for the master node
* Fix acceptor tests now that mask is being used
* Use `cached_property` for web server routes
* Use `select(timeout=1)` otherwise acceptor wont join if total blocking
* mypy, flake, doc spell fixes
* R0205: Class `cached_property` inherits from object, can be safely removed from bases in python3 (useless-object-inheritance)
* Add tests for public/private/csr generation
* Add integration testing skeleton for mac and ubuntu
* Merge integration within lib test to avoid too many workflows
* Disable integration testing on windows for now
* Use sudo to start integration test script as lsof fails on MacOS.
lsof: WARNING: can't stat() vmhgfs file system
* Add basic integration testing for now to assert proxy works as expected when started out of develop branch
* Add a call to inbuilt http server to verify it works
* wait for server to accept requests
Abhinav Singh