add version flag to all tools
Description
some BIND 9 tools (such as arpaname, named-checkconf, named-checkzone, named-rrchecker, maybe more) don't have a version information that can be printed out.
That makes it harder to identify old versions in the path (it would have helped me to identify the problem in issue #151 (closed) faster).
Request
Give all BIND 9 tools / commandline commands a "-V" switch that prints out the BIND 9 release version the binary originated from.