I think they should be made synonyms. They refer to the exact same thing even. Here's the tag wiki for resolv.conf:
The resolv.conf file contains information that is read by the resolver (a set of C library routines that provide access to the Internet Domain Name System (DNS).)
Here is the tag wiki for resolvconf:
Synonym to resolv.conf.
So clearly someone thinks they are synonyms. But, they aren't tag synonyms. I think resolv.conf should be the main one, and resolvconf should be merged into that, given that
resolv.conf is the filename (located in