knotd: remove EDE where redundant or incorrect, refactoring

src/knot/modules/dnsproxy/dnsproxy.c

src/knot/modules/onlinesign/onlinesign.c

src/knot/modules/queryacl/queryacl.c

src/knot/nameserver/axfr.c

src/knot/nameserver/internet.c

src/knot/nameserver/internet.h

src/knot/nameserver/ixfr.c

src/knot/nameserver/process_query.c

src/knot/nameserver/update.c

src/libknot/rrtype/opt.h