CONTRIB: release-estimator: Add release estimating tool

This tool monitors the HAProxy stable branches and calculates a proposed
release date for the next minor release based on the bug fixes that are in
the queue.

Print only:
    ./release-estimator.py --print

Send email:
    ./release-estimator.py --send-mail --from-email from@domain.local --to-email to@domain.local

See contrib/release-estimator/README.md for details.
2 files changed