dont escape exclamation points in sh scripts

debian/ngcp-rtpengine-daemon.init

@@ -45,9 +45,9 @@ set -e
 OPTIONS=""
 
 [ -z "$ADDRESS" ] || OPTIONS="$OPTIONS --interface=$ADDRESS"
-[ -z "$ADV_ADDRESS" ] || OPTIONS="$OPTIONS\!$ADV_ADDRESS"
+[ -z "$ADV_ADDRESS" ] || OPTIONS="$OPTIONS!$ADV_ADDRESS"
 [ -z "$ADDRESS_IPV6" ] || OPTIONS="$OPTIONS --interface=$ADDRESS_IPV6"
-[ -z "$ADV_ADDRESS_IPV6" ] || OPTIONS="$OPTIONS\!$ADV_ADDRESS_IPV6"
+[ -z "$ADV_ADDRESS_IPV6" ] || OPTIONS="$OPTIONS!$ADV_ADDRESS_IPV6"
 [ -z "$LISTEN_TCP" ] || OPTIONS="$OPTIONS --listen-tcp=$LISTEN_TCP"
 [ -z "$LISTEN_UDP" ] || OPTIONS="$OPTIONS --listen-udp=$LISTEN_UDP"
 [ -z "$LISTEN_NG" ] || OPTIONS="$OPTIONS --listen-ng=$LISTEN_NG"

el/rtpengine.init

@@ -63,7 +63,7 @@ build_opts() {
 
 	if [[ -n "$RTP_ADV_IP" ]]
 	then
-		OPTS+="\!$RTP_ADV_IP"
+		OPTS+="!$RTP_ADV_IP"
 	fi
 
 	if [[ -n "$RTP_IP6" ]]
@@ -74,7 +74,7 @@ build_opts() {
 
 	if [[ -n "$RTP_ADV_IP6" ]]
 	then
-		OPTS+="\!$RTP_ADV_IP6"
+		OPTS+="!$RTP_ADV_IP6"
 	fi
 
 	if [[ -n "$LISTEN_TCP" ]]