openpam: Sync OpenPAM modules a bit with FreeBSD.Not much to see here, except some bugfixes. Oh, and ed25519 supportin pam_ssh.
openpam: Since there is no pam(8) manual page, refer to pam(3).
libpam: Reorganize libpam build structure.In preparations for hooking back the openpam_static.cNo functional change except for debug info (paths have changed).