Fixes#8427
This PR converts the Python 2 types hints into Python 3 types annotations. I have used the project https://github.com/ilevkivskyi/com2ann which has been designed for that specific purpose and did that very well.
The only remaining things to do were to fix broken type hints that became wrong code after migration, and to fix lines too long with the new syntax.
* Raw execution of com2ann
* Fixing broken type annotations
* Cleanup imports
There are still some left, but the `modification_check` test fails. Some are still in `tools`, and they can probably be removed as well. `with_statement` was introduced officially in Python 2.5, so there's really old stuff in the code base.
* tests: add certbot-dns-rfc2136 integration tests
* dont use 'with' form of socket.socket
fixes py2 crash
* address some feedback:
- conftest: make DNS server a global resource
- conftest: add dns_xdist parameter into node config
- conftest: add --dns-server=bind flag
- conftest: if configured, point the ACME server to the DNS server
- dnsserver: make it sort-of compatible with xdist (future-proofing)
- context: parameterize dns-rfc2136 credentials file (future proofing)
- context: reduce dns-rfc2136 propagation time to speed up tests
- tox: add a integration-dns-rfc2136 target
- rfc2136: add a test/zone for subdelegation
- rfc2136: skip tests if no DNS server is configured
* try add integration-dns-rfc2136 to CI
* mock recursive dns via RPZ
* update --dns-server args and tox.ini args
* address more feedback:
- dns_server: rename rfc2136 creds file to .tpl
- dns_server: dont vary dns server port, instead we will vary zone names (#8455)
- dns_server: log error if bind9 fails to stop cleanly
- dns_server: replace assert with raise
- context: remove redundant _worker_id
- context: remove redundant cleanup override
- context: fix seek/flush in credentials context manager
- context: rename skip_if_no_server -> ...bind_server
- context: add newline EOF
* conftest: document _setup_primary_node sideeffects
* ci: rfc2136-integration from standard->nightly
* fix _stop_bind (function was renamed to stop)
* ignore errors from shutil.rmtree during cleanup
* dns_server: check for crash while polling
* remove --dry-run from rfc2136 test
