• don't try to modify things outside of ${WRKDIR}
• cleanup pkg-message handling: we don't need a base pkg-message: we generate ${WRKSRC}/pkg-message from ${FILESDIR}/pkg-message.in
• pkg-message -> ${PKGMESSAGE}
• use a different example host to ping6 in pkg-message.in

PR: 31921
Submitted by: maintainer