add_ssharg
add_ssharg(&sshargs, &nargs, SSH_PATH);
add_ssharg(&sshargs, &nargs, "-axs");
add_ssharg(&sshargs, &nargs, "-oClearAllForwardings=yes");
add_ssharg(&sshargs, &nargs, "-F");
add_ssharg(&sshargs, &nargs, optarg);
add_ssharg(&sshargs, &nargs, "-o");
add_ssharg(&sshargs, &nargs, optarg);
add_ssharg(&sshargs, &nargs, "-l");
add_ssharg(&sshargs, &nargs, user);
add_ssharg(&sshargs, &nargs, host);
add_ssharg(&sshargs, &nargs, "sftp");
static void add_ssharg(char ***, int *, const char *);