sshbuf-io.c doesn't need SSHBUF_INTERNAL set OpenBSD-Commit-ID: 27a724d2e0b2619c1a1490f44093bbd73580d9e6
functions; feedback and ok markus@ OpenBSD-Commit-ID: dc09e5f1950b7acc91b8fdf8015347782d2ecd3d