Updated README to reflect state of Nginx plugin
Updated README to reflect state of Nginx plugin

twstrike/le_for_patching,wteiken/letsencrypt,kuba/letsencrypt,piru/letsencrypt,hsduk/lets-encrypt-preview,dietsche/letsencrypt,bsmr-misc-forks/letsencrypt,BKreisel/letsencrypt,stweil/letsencrypt,jsha/letsencrypt,jsha/letsencrypt,lmcro/letsencrypt,mrb/letsencrypt,martindale/letsencrypt,VladimirTyrin/letsencrypt,thanatos/lets-encrypt-preview,xgin/letsencrypt,hsduk/lets-encrypt-preview,lmcro/letsencrypt,wteiken/letsencrypt,stweil/letsencrypt,mitnk/letsencrypt,sjerdo/letsencrypt,TheBoegl/letsencrypt,BillKeenan/lets-encrypt-preview,jtl999/certbot,BKreisel/letsencrypt,g1franc/lets-encrypt-preview,goofwear/letsencrypt,lbeltrame/letsencrypt,jtl999/certbot,Sveder/letsencrypt,bsmr-misc-forks/letsencrypt,brentdax/letsencrypt,goofwear/letsencrypt,mitnk/letsencrypt,xgin/letsencrypt,ghyde/letsencrypt,BillKeenan/lets-encrypt-preview,letsencrypt/letsencrypt,DavidGarciaCat/letsencrypt,lbeltrame/letsencrypt,piru/letsencrypt,thanatos/lets-encrypt-preview,kuba/letsencrypt,DavidGarciaCat/letsencrypt,twstrike/le_for_patching,VladimirTyrin/letsencrypt,g1franc/lets-encrypt-preview,mrb/letsencrypt,sjerdo/letsencrypt,letsencrypt/letsencrypt,brentdax/letsencrypt,ghyde/letsencrypt,martindale/letsencrypt,TheBoegl/letsencrypt,dietsche/letsencrypt,Sveder/letsencrypt