api: add HookRetryStrategy
api: add HookRetryStrategy

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