Log Message:
mitmproxy: Update to 8.1.1

pkgsrc changes:
 - Follow upstream requirements for py-cryptography (previously a workaround was
   added in order to avoid possible too new py-cryptography that was not yet
   present in pkgsrc)

Changes:
8.1.1
-----
* Support specifying the local address for outgoing connections
* Fix a bug where an excess empty chunk has been sent for chunked HEAD request.
* Drop pkg_resources dependency.
* Fix huge (>65kb) http2 responses corrupted.
* Remove overambitious assertions in the HTTP state machine,
  fix some error handling.