smaller and does not require external EXTRACT_DEPENDS)
- Do not hardcode list of programs twice, use ${PLIST_FILES:T} second time
- Use official spelling of PKZIP in COMMENT
- Unsplit PLIST_FILES definitions (join into one line) similar to MAN1
- Install seemingly useful documentation files
- Pacify portlint(1) and cleanup things a bit
- Canonicalize and reformat Makefile header while I am here