LZMA/ZSTD descriptor compression support

Hi lovely core tor folks. I've been working on Stem support for spec 278 which was merged in tor 0.3.1.1 but I'm struggling to find an example of it working in practice...

https://gitweb.torproject.org/torspec.git/commit/?id=1cb56af https://gitweb.torproject.org/user/atagar/stem.git/commit/?h=compression

Moria1 is running tor 0.3.4.0 so it definitely should have lzma and zstd compression support, but when I query its dirport only the identity and deflate headers seem to work...

% curl --header "Accept-Encoding: identity" 128.31.0.39:9131/tor/server/fp/9695DFC35FFEB861329B9F1AB04C46397020CE31
router moria1 128.31.0.34 9101 0 9131
identity-ed25519
-----BEGIN ED25519 CERT-----
AQQABnxNAQS9ja600v/ZodOUiu7NepTkbPIOrFPgEVQE+03rGBtPAQAgBADKnR/C
2nhpr9UzJkkbPy83sqbfNh63VgFnCpkSTULAcq52z8xM7raRDCiTJTu/FK/BJGgE
dJcFQ8MgZJOuYgFKcMVyQ6j2FGbhDI0zQTK1+TAPNRG4ixiF7h7wqDT9Ugw=
-----END ED25519 CERT-----
master-key-ed25519 yp0fwtp4aa/VMyZJGz8vN7Km3zYet1YBZwqZEk1CwHI
platform Tor 0.3.4.0-alpha-dev on Linux
...

% curl --header "Accept-Encoding: deflate" 128.31.0.39:9131/tor/server/fp/9695DFC35FFEB861329B9F1AB04C46397020CE31
[ compressed data ]

% curl --header "Accept-Encoding: x-zstd" 128.31.0.39:9131/tor/server/fp/9695DFC35FFEB861329B9F1AB04C46397020CE31
[ uncompressed data, same as 'identity' ]

% curl --header "Accept-Encoding: x-tor-lzma" 128.31.0.39:9131/tor/server/fp/9695DFC35FFEB861329B9F1AB04C46397020CE31
[ uncompressed data, same as 'identity' ]