Keep Snap fullnode/drone logs out of syslog, we're too spammy

ci/snap.sh

@@ -37,6 +37,12 @@ fi
 
 set -x
 
+echo --- checking for multilog
+if [[ ! -x /usr/bin/multilog ]]; then
+  echo "multilog not found, install with: sudo apt-get install -y daemontools"
+  exit 1
+fi
+
 echo --- build
 snapcraft