* tests/gpgscm/tests.scm (path-expand): New function.
* tests/openpgp/Makefile.am (TESTS): Add new test.
(sample_keys): Add new keys.
(CLEANFILES): Clean ssh socket and control file.
* tests/openpgp/fake-pinentry.c (main): Add a default passphrase.
* tests/openpgp/gpg-agent.conf.tmpl: Enable ssh support.
* tests/openpgp/samplekeys/ssh-dsa.key: New file.
* tests/openpgp/samplekeys/ssh-ecdsa.key: Likewise.
* tests/openpgp/samplekeys/ssh-ed25519.key: Likewise.
* tests/openpgp/samplekeys/ssh-rsa.key: Likewise.
* tests/openpgp/ssh.scm: Likewise.