RFD 26: small refactoring of endpoints related to volumes references
RFD 26: small refactoring of endpoints related to volumes references

joyent/rfd,joyent/rfd,melloc/rfd,joyent/rfd,davepacheco/rfd,rmustacc/rfd,joyent/rfd,melloc/rfd,davepacheco/rfd,melloc/rfd,rmustacc/rfd,davepacheco/rfd,davepacheco/rfd,AnthonyMann/rfd,davepacheco/rfd,AnthonyMann/rfd