pazpar2 1.6.39 (attempt 2)

Address @mikemcquaid’s remarks on pull request #27547:

* add a test: (ask pazpar2 to test a trivial server
	configuration file; to be honest I doubt this test
	is much more significant than testing the version)
* use double quotes instead of quotes for strings
	(it would be helpful if the examples/documentation
	just stated this »rule«)
* use make install instead of bin.install (the binary
	ends up in sbin this way)