New DANE TLSA monitoring/diagnostic utility

I am pleased to offer to the DANE user community a new monitoring and diagnostic utility. This is a one-shot variant of my survey code specialized for monitoring cron jobs and troubleshooting.

Code and instructions at https://github.com/vdukhovni/danecheck

While Haskell may be an unfamiliar programming development toolchain for many of you, I hope that it will not be difficult to install it for the purpose of compiling an existing project. See the README.md for build instructions.

Enjoy.