pam_ssh_agent_auth-0.10.4-bp156.2.5

- [Re-]Adding pam_ssh_agent_auth-0.10.4.tar.gz which was removed,
  repackaged and required.

- Switching to https://github.com/FlorianFranzen/pam_ssh_agent_auth,
  branch: "just-one-big-cookie" for ed25519 & Yubikey support.

- Use %_pam_moudledir - which was actually my recommendation.
- Pass --libexecdir=%{_pam_moduledir} to configure as the
  build system very badly abused libexecdir for the install
  location.

- Updating spec file per @dimstar's recommendations.

- Update to version 0.10.4:
  * test pubkeys from SSH_AUTH_INFO_0 against authorized_keys. (#15)
  * Check against the correct OPENSSL_VERSION_NUMBER
  * Adapt to OpenSSL 1.1.1.
  * proc_pid_cmdline: fix type for feof(3)/fgetc(3)
  * authfd.c: check return value of seteuid(2)
  * Fix for release, and fix some review items.
  * ed25519 support
  * helps to actually add the implementation
  * initial support for ecdsa ssh keys
  * merging 0.10.2-rc1 into trunk