Update offensive terminology
I found some instances of the term "master" here: https://support.torproject.org/operators/#offline-ed25519
It has been recommended that "master-slave" terminology be replaced with suitable alternatives. See: https://tools.ietf.org/id/draft-knodel-terminology-00.html#rfc.section.1.1
(while changing the word "master" in the context of the filename of the public key is not possible, it should be done in the context of straight prose.)