Merge branch '1.2.0-rc3' into 'master'

Prepare 1.2.0-rc3 release

See merge request !171

NEWS

-Knot Resolver 1.2.0-rc2 (2017-01-20)
+Knot Resolver 1.2.0-rc3 (2017-01-24)
 ====================================
 
 Security:
@@ -18,6 +18,7 @@ Improvements:
 - DNS over TLS now creates ephemeral certs.
 - Configurable cache.{min,max}_tll option, with max_ttl defaulting to 6 days.
 - Option to reorder RRs in the response.
+- New policy.TRACE() policy to print packet contents
 
 Bugfixes:
 ---------

config.mk

@@ -2,7 +2,7 @@
 MAJOR := 1
 MINOR := 2
 PATCH := 0
-EXTRA := -rc2
+EXTRA := -rc3
 ABIVER := 2
 BUILDMODE := dynamic
 HARDENING := yes