Better error checking on private key and csr.  Also, pull in file names instead of pointers.
Better error checking on private key and csr.  Also, pull in file names instead of pointers.

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