Updated copyright notices to include the year 2018.
global: Fixed missing or out-of-date copyright notices.
var-expand-crypt: Fix data decryption
var-expand-crypt: Add error handling for initialization
var-expand-crypt: Do not free dcrypt context twice Found by coverity
var-expand-crypt: Remove pointless assigment It's never used
var-expand-crypt: Fix base64 encoding the break was missing, also removed confusing block.
var-expand-crypt: Encryption/decryption support for var-expand Registers new encrypt and decrypt processors for var-expand.