add_identity_file
add_identity_file(options, NULL,
add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_RSA, 0);
add_identity_file(options, "~/", _PATH_SSH_CLIENT_ID_ECDSA, 0);
add_identity_file(options, "~/",
add_identity_file(options, "~/",
add_identity_file(options, "~/",
void add_identity_file(Options *, const char *, const char *, int);
add_identity_file(&options, NULL, p, 1);