* test/lisp/erc/resources/erc-d/erc-d.el (erc-d-server-fqdn, erc-d--initialize-client, erc-d--log, erc-d--send, erc-d--filter, erc-d-run): Add new variable and use it. Also optionally accept keyword arguments in `erc-d-run'. * test/lisp/erc/resources/erc-d/erc-d-tests.el (erc-d-run-direct-foreign-protocol): Add test demoing newline-only line-wise protocol. * test/lisp/erc/resources/erc-d/resources/foreign.eld: New file.