updated changelog for 2.1 and 2.2
Added 2.1 and 2.2 releases to changelog
Move exception out of crypto_util
Refactor guid exists check
Merge pull request #880 from hoffmabc/decline-legacy-msgs

Move exception out of crypto_util
Merge pull request #876 from gubatron/changelog-sync-issue-831

Changelog sync - Issue #831
Test util.