Only set the discovery channel once and protect access to it with a mutex
Only set the discovery channel once and protect access to it with a mutex

kat-co/juju,dooferlad/juju,mikemccracken/juju,alesstimec/juju,howbazaar/juju,bz2/juju,mikemccracken/juju,marcmolla/juju,anastasiamac/juju,davecheney/juju,howbazaar/juju,davecheney/juju,frankban/juju,dooferlad/juju,marcmolla/juju,dooferlad/juju,davecheney/juju,axw/juju,frankban/juju,bac/juju,ericsnowcurrently/juju,gabriel-samfira/juju,gabriel-samfira/juju,waigani/juju,macgreagoir/juju,gabriel-samfira/juju,bac/juju,macgreagoir/juju,frankban/juju,anastasiamac/juju,makyo/juju,howbazaar/juju,gabriel-samfira/juju,alesstimec/juju,axw/juju,waigani/juju,bz2/juju,marcmolla/juju,anastasiamac/juju,ericsnowcurrently/juju,bogdanteleaga/juju,AdamIsrael/juju,perrito666/juju,bz2/juju,AdamIsrael/juju,perrito666/juju,axw/juju,kat-co/juju,reedobrien/juju,reedobrien/juju,mikemccracken/juju,marcmolla/juju,axw/juju,mjs/juju,makyo/juju,makyo/juju,macgreagoir/juju,mjs/juju,perrito666/juju,macgreagoir/juju,davecheney/juju,kat-co/juju,anastasiamac/juju,ericsnowcurrently/juju,dooferlad/juju,bogdanteleaga/juju,reedobrien/juju,howbazaar/juju,dimitern/juju,axw/juju,mjs/juju,dooferlad/juju,reedobrien/juju,alesstimec/juju,waigani/juju,bac/juju,AdamIsrael/juju,ericsnowcurrently/juju,kat-co/juju,waigani/juju,dimitern/juju,frankban/juju,gabriel-samfira/juju,bac/juju,kat-co/juju,dimitern/juju,macgreagoir/juju,mjs/juju,bogdanteleaga/juju,perrito666/juju,frankban/juju,alesstimec/juju,makyo/juju,perrito666/juju,mjs/juju,mikemccracken/juju,bogdanteleaga/juju,bz2/juju,reedobrien/juju,bz2/juju,dimitern/juju,mikemccracken/juju,mjs/juju,howbazaar/juju,marcmolla/juju,mjs/juju,anastasiamac/juju,alesstimec/juju,ericsnowcurrently/juju,dimitern/juju,AdamIsrael/juju,bac/juju