add ipv6 options to init/default script

debian/ngcp-mediaproxy-ng-daemon.default

@@ -3,6 +3,8 @@ LISTEN=25060
 LISTEN_UDP=12222
 # ADDRESS=...
 # ADV_ADDRESS=...
+# ADDRESS_IPV6=...
+# ADV_ADDRESS_IPV6=...
 TIMEOUT=60
 SILENT_TIMEOUT=3600
 PIDFILE=/var/run/ngcp-mediaproxy-ng-daemon.pid

debian/ngcp-mediaproxy-ng-daemon.init

@@ -53,6 +53,8 @@ OPTIONS=""
 [ -z "$PORT_MIN" ] || OPTIONS="$OPTIONS --port-min=$PORT_MIN"
 [ -z "$PORT_MAX" ] || OPTIONS="$OPTIONS --port-max=$PORT_MAX"
 [ -z "$ADV_ADDRESS" ] || OPTIONS="$OPTIONS --advertised-ip=$ADV_ADDRESS"
+[ -z "$ADDRESS_IPV6" ] || OPTIONS="$OPTIONS --ip6=$ADDRESS_IPV6"
+[ -z "$ADV_ADDRESS_IPV6" ] || OPTIONS="$OPTIONS --advertised-ip6=$ADV_ADDRESS_IPV6"
 [ -z "$REDIS" ] || OPTIONS="$OPTIONS --redis=$REDIS"
 [ -z "$REDIS_DB" ] || OPTIONS="$OPTIONS --redis-db=$REDIS_DB"
 OPTIONS="$OPTIONS --table=$TABLE"