Doc: missing regex syntax reference
A regex syntax reference was available in the old documentation:
https://developer-old.gnome.org/glib/stable/glib-regex-syntax.html
but seems missing in the new gi-docgenerated one:
https://docs.gtk.org/glib/index.html
Looks like the source is still in git (docs/reference/glib/regex-syntax.xml), would it be possible to include it again? Thanks