Merge branch 'rule_based_answering' into 'master'

Knot.files

doc/configuration.texi

doc/reference.texi

doc/synth_record.texi

man/knot.conf.5.in

samples/knot.full.conf

src/Makefile.am

src/knot/conf/cf-lex.l

src/knot/conf/cf-parse.y

src/knot/conf/conf.c

src/knot/conf/conf.h

src/knot/modules/synth_record.c

src/knot/modules/synth_record.h

src/knot/nameserver/internet.c

src/knot/nameserver/internet.h

src/knot/nameserver/process_query.c

src/knot/nameserver/process_query.h

src/knot/nameserver/query_module.c

src/knot/nameserver/query_module.h

src/knot/updates/acl.c