New version of ec2nodefinder

ec2nodefinder is an application that enables remote erlang node discovery when hosted on EC2.

This new version uses the EC2 query interface instead of os:cmd’ing the amazon api tools.

It has no external dependencies now when deploying the release. Previous needed Java and the API tools.

Finally removed the need for the cert and pk files. It only uses AMAZONACCESSKEYID and AMAZONSECRETACCESSKEY.

Also new is an implementation of V2 signature code for AWS.
Given that V1 is deprecating at the end of the year, that’s a head start.

I did not see it anywhere in erlang yet, so HTH (as they say).

TODO : the secret key tend to come up in the logs. It will be removed in an upcoming release.

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