Rules.CSV format as alternative to htaccess

So here is my suggestion for rules.csv format and mechanism:

https://github.com/stain/w3id-csv/wiki/rules.csv-format

In short, a CSV file (which you can edit in your favourite spreadsheet
editor) could be used to auto generate corresponding .htaccess (of
everything is in order) in a w3id folder.

I added an optional column for content negotiatation. i think this could
cover 90% of existing .htaccess files (although they would not need to
"upgrade")

Then for purl.org transitions we can simply generate there rules.csv files.

Ideas? Suggestions? Feel free to edit in the wiki as well!