- replace VERSION with PACKAGE_VERSION in src/bin/admin to avoid
  overlap with VERSION used in src/share/database.
- add -V to kea-admin
- add -V to kea-shell
- add -V to keactrl
- add -V to perfdhcp
- removed getVersionAddendum from d2 and added the openssl version to
  the output of other process versions since it's not only used by d2
- make all -V outputs consistent. Some are showing only core version and
  are missing premium version which is fine since they are the
  executables that don't have something to do with premium directly
  anyway.