Show built-in features in --version output
send empty SERVFAIL on exeeded retargetcount and log failures
update loop breakout test
Introduce makeUNsockaddr and have everybody use it

makeUNsockaddr does the length check in a central place, and calling
code should be a bit more readable now.
add gsqlite tests to travis and remove cache tests to save some time
speedup tests
add .dirstamp to .gitignore
pgsql take1