daemon/lua/trust_anchors: don't crash when dealing with unknown algorhitm

Closes #449 (closed)

• Depends on deckard!159 (merged)
• Depends on respdiff!52 (merged)

scripts/launch-test-instance.sh

-#!/bin/sh -e
-export PATH="/usr/lib/ccache:$PATH"
-
-PORT=${1:-$((32767+$(dd if=/dev/urandom count=1 2> /dev/null | cksum | cut -d' ' -f1) % 32768))}
-
-JOBS=$(cat /proc/cpuinfo  | grep processor | wc -l)
-
-WORKDIR=${2:-$(mktemp -d /tmp/knot-resolver.XXXXXX)}
-
-PREFIX=${PREFIX:-$WORKDIR} make clean
-
-CFLAGS=${CFLAGS:-"-O2 -g3"} PREFIX=${PREFIX:-$WORKDIR} make -j ${JOBS} V=1
-
-PREFIX=${PREFIX:-$WORKDIR} make install
-
-install -d -m 0700 ${WORKDIR}/run/kresd
-
-echo "Launching Knot Resolver on port: ${PORT}"
-echo "To debug, use:"
-echo "dig +dnssec +multi +time=60 +retry=1 -p ${PORT} @::1"
-
-LD_LIBRARY_PATH=${WORKDIR}/lib ${WORKDIR}/sbin/kresd -a 127.0.0.1#${PORT} -a ::1#${PORT} -v -k ${ROOT_KEY:-/usr/share/dns/root.key} ${WORKDIR}/run/kresd
-
-if [ "${WORKDIR}" != "${2}" -a "${KEEP_WORKDIR}" != "yes" ]; then
-    rm -r ${WORKDIR}
-fi