Minor document questions

[kaorahi]

On kata-get-param in docs/GTP_Extensions.md, is the sentence "Current supported PARAMs are:" outdated? Many more PARAMs are listed by kata-list-params. Are these also supported by kata-set-param?

On rootNumSymmetriesToSample in cpp/configs/gtp_human5k_example.cfg, is "28 instead of 8" correct? Or, just a typo of "2 instead of 8"?

$ git show --quiet --pretty=format:'%h%d'
c25fd8ba (HEAD -> master, upstream/master)