- Sanitize and cleanup the port a bit: remove "Portname is ..." from COMMENT,
drop useless EXTRACT_SUFX, define LICENSE (GPLv3), sort the knobs, etc.
- Do not patch ./install.zsh file; it is nearly identical to ./install.sh
except for the _f file, which can be installed separately (do so)
- Stagify, use OPTIONS helpers, trim superfluous whitespace here and there