Viktor Dukhovni wrote:
Barring sophistry, it is no more offensive, than a master key for a physical lock, a Master's degree, a master crafsman (rather than a novice or an apprentice), mastering a skill, ...
But, "master/mister/mistress" implies that there are servants or slaves and: https://en.wikipedia.org/wiki/Servus These words originate from servus, the Latin word for servant or slave. In Roman era, all the servants should have been slaves.
Since "master nameserver" and "secondary nameserver" are not a natural pairing,
I'm afraid you are ignoring history, though short, in US that blacks were and, maybe, still are, treated as second class ^^^^^^ citizens long after enslavement was illegalized. See, for example, speech by Martin Luther King, Jr.: http://okra.stanford.edu/transcription/document_images/Vol05Scans/25Sept1960_TheNegroandtheAmericanDream,ExcerptfromAddressatt.pdf It is a trite yet urgently true observation that if America is to remain a firstclass nation it cannot have secondclass citizens. According to your theory, you should totally avoid saying "second" or "secondary". Masataka Ohta