Merge branch 'zone-events-queue' into opt-refactor

Knot.files

src/Makefile.am

src/knot/nameserver/axfr.c

src/knot/nameserver/internet.c

src/knot/nameserver/internet.h

src/knot/nameserver/notify.c

src/knot/nameserver/process_answer.c

src/knot/nameserver/process_answer.h

src/knot/nameserver/process_query.c

src/knot/nameserver/process_query.h

src/knot/nameserver/requestor.c

src/knot/nameserver/requestor.h

src/knot/nameserver/tsig_ctx.c

src/knot/nameserver/tsig_ctx.h

src/knot/zone/events.c

src/libknot/processing/process.c