implement CNAME following when requested from Lua.
API: return status 204 on successful delete

204 No Content is meant to indicate that the data (zone) is now gone.

Also add tests to make sure DELETE works.

Fixes #1422.
disable boost::format exceptions in gsql backend
stay away from getaddrinfo unless we really can't help it for ascii ipv6 conversions to binary
Merge pull request #1427 from zeha/api-delete-204

API: return status 204 on successful delete
fix an important omission from the docs
Support for PKCS#11 signing
Add missing options and conditionals to enable pkcs#11 when needed
Merge pull request #1411 from cmouse/experimental-pkcs11-rollup-1

PKCS#11 rollup patch
Merge remote-tracking branch 'origin/cnamefollow'
add documentation for follow cname option in Lua.
implement patch from #424 improving ('fixing') our average latency calculation. Closes #424.
add comment, plus add dnslabeltext.rl to recursor tarball as requested in #1406. Closes #1406.
add ragel compilation rule to recursor makefile to please the 'preferred form of modification' gods
touch dnslabeltext.cc in dist-recursor to avoid useless recompile, thanks @mind04
Add zone into AXFR query
Only support it for v3 and above
Bump version to 4
Documentation for pipebackend axfr change
Optimize abiVersion usage