jvb: add JVB_ADVERTISE_IPS, deprecating DOCKER_HOST_ADDRESS

The new variable has a better purposed name, and supports a comma
separated list of IPs instead of a single one, which should help those
running split-horizon setups.

jvb/rootfs/etc/cont-init.d/10-config

@@ -13,6 +13,14 @@ fi
 
 [ -z "${XMPP_SERVER}" ] && export XMPP_SERVER=xmpp.meet.jitsi
 
+# Migration from DOCKER_HOST_ADDRESS to JVB_ADVERTISE_IPS
+if [[ -z "${JVB_ADVERTISE_IPS}" ]]; then
+    if [[ ! -z "${DOCKER_HOST_ADDRESS}" ]]; then
+        echo "WARNING: DOCKER_HOST_ADDRESS is deprecated, migrate to JVB_ADVERTISE_IPS"
+        export JVB_ADVERTISE_IPS=${DOCKER_HOST_ADDRESS}
+    fi
+fi
+
 # On environments like Swarm the IP address used by the default gateway need not be
 # the one used for inter-container traffic. Use that one for our fallback ID.
 XMPP_SERVER_IP=$(dig +short +search ${XMPP_SERVER})