Accept a salt for opened_key creation.
Accept a salt for opened_key creation.

Like the recent change for token creation, the opened_key sometimes
needs to be re-computed with the prior salt to get the same value, in
order to detect tampering of the election data. Thus, take the salt as
a parameter, rather than internal creation and return.

apache/steve,apache/steve,apache/steve,apache/steve,apache/steve,apache/steve