Nexus 2 Legacy URL activation support ( content/ ) was added in Nexus 3 as per NEXUS-9976
Support for /service/local/nuget/<repoid> style urls was omitted however. This means that NuGet repository clients must change their repository URLs to the new Nexus 3 style before Nexus 3 can work. ( repository/<repoid> )
NuGet was the only repository format that required special URLs in Nexus 2. Add support for these special URLs in Nexus 3 to make upgrade more seamless.
We should address site repos when we do this as well, since they're mapped under content/sites in NXRM2.