Make the Onigmo patch obsolete

[herwinw]

One of my "I want to do this some day but not right now" tasks.

We currently have a one line patch for Onigmo to enable the use of uppercase letters in capture group names, but disable the Ruby bindings.

It would be nice if we could push a patch upstream to split this compile option, where defining RUBY would imply the extra range of capture groups, but it should be possible to enable that extra range separately.

[herwinw]

https://github.com/k-takata/Onigmo

Latest release in January 2019, last commit in February 2021. I'm not sure if this project is still actively maintained.

[seven1m]

Interesting. There is a newer commit to the Onigmo embedded in CRuby here: ruby/ruby@1d2d25d

...and that commit was not upstreamed to Onigmo proper. 🤔

[herwinw]

Issue started with an attempt to remove a patch, issue is turning into an attempt to add a second patch 🤣