Update README.rst
Update README.rst

Added example for SAN certificates
g1franc/lets-encrypt-preview,rugk/letsencrypt,jmhodges/letsencrypt,wteiken/letsencrypt,bsmr-misc-forks/letsencrypt,Bachmann1234/letsencrypt,deserted/letsencrypt,rlustin/letsencrypt,BKreisel/letsencrypt,goofwear/letsencrypt,rugk/letsencrypt,PeterMosmans/letsencrypt,piru/letsencrypt,goofwear/letsencrypt,PeterMosmans/letsencrypt,ghyde/letsencrypt,twstrike/le_for_patching,ghyde/letsencrypt,modulexcite/letsencrypt,armersong/letsencrypt,mitnk/letsencrypt,tdfischer/lets-encrypt-preview,BKreisel/letsencrypt,Sveder/letsencrypt,modulexcite/letsencrypt,jmaurice/letsencrypt,jtl999/certbot,xgin/letsencrypt,riseofthetigers/letsencrypt,letsencrypt/letsencrypt,VladimirTyrin/letsencrypt,jmaurice/letsencrypt,sapics/letsencrypt,luorenjin/letsencrypt,luorenjin/letsencrypt,skynet/letsencrypt,hlieberman/letsencrypt,skynet/letsencrypt,bestwpw/letsencrypt,solidgoldbomb/letsencrypt,dietsche/letsencrypt,jsha/letsencrypt,wteiken/letsencrypt,brentdax/letsencrypt,ruo91/letsencrypt,Jadaw1n/letsencrypt,DavidGarciaCat/letsencrypt,TheBoegl/letsencrypt,martindale/letsencrypt,ahojjati/letsencrypt,jmhodges/letsencrypt,dietsche/letsencrypt,Bachmann1234/letsencrypt,beermix/letsencrypt,solidgoldbomb/letsencrypt,tyagi-prashant/letsencrypt,riseofthetigers/letsencrypt,brentdax/letsencrypt,hlieberman/letsencrypt,mrb/letsencrypt,beermix/letsencrypt,letsencrypt/letsencrypt,ahojjati/letsencrypt,lmcro/letsencrypt,tdfischer/lets-encrypt-preview,hsduk/lets-encrypt-preview,sjerdo/letsencrypt,TheBoegl/letsencrypt,bsmr-misc-forks/letsencrypt,stweil/letsencrypt,BillKeenan/lets-encrypt-preview,jsha/letsencrypt,sjerdo/letsencrypt,mitnk/letsencrypt,Hasimir/letsencrypt,Jadaw1n/letsencrypt,rutsky/letsencrypt,BillKeenan/lets-encrypt-preview,vcavallo/letsencrypt,martindale/letsencrypt,vcavallo/letsencrypt,twstrike/le_for_patching,rutsky/letsencrypt,lbeltrame/letsencrypt,piru/letsencrypt,armersong/letsencrypt,stweil/letsencrypt,thanatos/lets-encrypt-preview,kuba/letsencrypt,sapics/letsencrypt,Jonadabe/letsencrypt,tyagi-prashant/letsencrypt,Sveder/letsencrypt,fmarier/letsencrypt,VladimirTyrin/letsencrypt,thanatos/lets-encrypt-preview,DavidGarciaCat/letsencrypt,ruo91/letsencrypt,bestwpw/letsencrypt,xgin/letsencrypt,kuba/letsencrypt,deserted/letsencrypt,stewnorriss/letsencrypt,hsduk/lets-encrypt-preview,lbeltrame/letsencrypt,mrb/letsencrypt,g1franc/lets-encrypt-preview,fmarier/letsencrypt,rlustin/letsencrypt,lmcro/letsencrypt,Hasimir/letsencrypt,kevinlondon/letsencrypt,jtl999/certbot,Jonadabe/letsencrypt,stewnorriss/letsencrypt,kevinlondon/letsencrypt