Renamed error codes

src/common/errors.c

src/dnslib/name-server.h

src/dnslib/tests/dnslib/edns_tests.h

src/dnslib/tests/realdata/dnslib/edns_tests_realdata.h

src/dnslib/xfr-in.h

src/knot/conf/conf.c

src/knot/conf/conf.h

src/knot/conf/logconf.c

src/knot/conf/logconf.h

src/knot/ctl/knotc_main.c

src/knot/ctl/process.c

src/knot/ctl/process.h

src/knot/main.c

src/knot/other/error.c

src/knot/other/error.h

src/knot/other/log.c

src/knot/other/log.h

src/knot/server/dthreads.c

src/knot/server/dthreads.h

src/knot/server/journal.c