Remove str() casting in Signature.from_msg
Remove str() casting in Signature.from_msg

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