* Rename middleware to plugin
first pass; mostly used 'sed', few spots where I manually changed
text.
This still builds a coredns binary.
* fmt error
* Rename AddMiddleware to AddPlugin
* Readd AddMiddleware to remain backwards compat
* mw/kubernetes: add apex test
This adds small test case for apex queries: SOA and HINFO.
Fix (obvious) parse bug in parse.go.
* Test Ns request also here