archivers/rpm4: fix packaging for plugins (+)
RPM installs plugins to separated subdir, and all of them was missed from plist.
Moreover, with disabled PLUGINS option, listed manpages are missing.
Fix it by wrap with sub macro.
Bump PORTREVISION due to plist changes.
Reporded by: poudriere build
Pointy hat to: rodrigo (for not use poudriere to catch leftovers)
Approved by: portmgr blanket (fix packaging)
Sponsored by: Netzkommune GmbH