closes #417

Feature: Display mismatched URL within UnmockedError whenever possible. Closes #388

Feature: Display mismatched URL via logging. #419

Add new properties to `httpretty.core.HTTPrettyRequest` (protocol, host, url, path, method).

* Refactor passthrough real TCP socket.

- Remove unused attribute `fakesock._closed`
- Always forward real socket calls when a "truesock" is present and connected.
- Improve state handling for real socket + whether it is connected or not.

* update changelog

* fix tests

* closes #254

* WIP: fixing tests

* fix tests

* add test to ensure matching host case insensitive

* move tests that reproduce github issues into their own folder

* fix tests

* fix more tests

* evaluate redis response to ensure TCP connection attempt

* fix unit test

* fix more tests

* restory flaky assertion

* fix redis connection check

* comment flaky debug test

* lint fix

* skip flaky test

* remove unused code

* change order of socket patching

run known urllib3 workarounds before everything else

* treat ssl-wrapping of urllib3 differently

* print python version in github actions

* fix eventlet compatibility

Use unittest.mock instead of external mock module whenever present.
This makes it possible to run tests without installing mock on Python 3.

Use mocked clock when running tests involving checking the 'Date'
header.  These tests used system clock so far which caused frequent
test failures if the check occurred in the second following generating
the response.

Fixes #376