The idea is to create a new type (to avoid ugly string parsing) and
then, instead of iterating through delegations with the username, iterate
through the delegations and look for your username and matching slot. Also
in cases we don't have the slot (everything but delegation), find the slot
when we match a user.
This commit adds ECC cases to functions checking for RSA records.
Additionally, the rsaEncryptedKey variable is changed to pubEncryptedKey
to reflect a general use of public key crypto.
