chg: usr: Add missing EDNS option mnemonics

chg: usr: Add missing EDNS option mnemonics

The `Report-Channel` and `ZONEVERSION` EDNS options can now be sent using `dig +ednsopt=report-channel` (or `dig +ednsopt=rc` for short), and `dig +ednsopt=zoneversion`.

Several other EDNS option names, including `DAU`, `DHU`, `N3U`, and `CHAIN`, are now displayed correctly in text and YAML formats. Also, an inconsistency has been corrected: the `TCP-KEEPALIVE` option is now spelled with a hyphen in both text and YAML formats; previously, text format used a space.

Merge branch 'each-add-missing-edns-opts' into 'main'

See merge request isc-projects/bind9!9691