fix(nvmf): deprecate old nvmf cmdline options

[aafeijoo-suse]

• Deprecate old nvmf cmdline options without the rd. prefix.
• Add missing rd.nonvmf cmdline option to man page.

Checklist

• I have tested it locally
• I have reviewed and updated any documentation if relevant
• I am providing new code and test(s) for it

Fixes #1831

[johannbg]

@aafeijoo-suse hmm dont we need to provide a transition period from "old" to "new" encase there are setups in the wild using the non rd prefixed parameters?

[johannbg]

@aafeijoo-suse dont get me wrong I'm not saying we should since I'm perfectly aware that people wont adapt until they have to so I personally would want to rip the bandage off so to speak immediately instead of allowing "transition" period of some sort so I'm fine with merging this either way.

[johannbg]

LGTM

[aafeijoo-suse]

You made me hesitate so I had to double-check it, but adding -d with the old option name to getarg just prints a deprecation warning and this old option name doesn't stop working.

[johannbg]

@aafeijoo-suse yeah it worked just fine, I'm just conflicted if we should or should not be providing backwards compatibilty with the old prefixes thus I needed a second opinion on the matter. ( sorry for getting you confused, still waking up on this end ;) )

[aafeijoo-suse]

@aafeijoo-suse hmm dont we need to provide a transition period from "old" to "new" encase there are setups in the wild using the non rd prefixed parameters?

Oh, the "don't" instead of "do" made me misunderstand your question :)

Yes, we know that allowing deprecated options without announcing an expiration date or something keeps people using it, but in this case would be too abrupt in my opinion.