Revert "The external signing command uses -sha256"
Revert "The external signing command uses -sha256"

This change was made to the wrong function, which was later
done correctly in c702aba4

This reverts commit 549f2dfe6ee271f658424703ae9e9dd50efdebb0.

Open343/pkg,junovitch/pkg,skoef/pkg,khorben/pkg,Open343/pkg,en90/pkg,skoef/pkg,en90/pkg,khorben/pkg,khorben/pkg,junovitch/pkg