Changed plugin interface return types (#3748). (#3780)
Changed plugin interface return types (#3748). (#3780)


jsha/letsencrypt,lmcro/letsencrypt,letsencrypt/letsencrypt,stweil/letsencrypt,lmcro/letsencrypt,letsencrypt/letsencrypt,jsha/letsencrypt,stweil/letsencrypt