fix broken exec chains

Signed-off-by: Zoey <zoey@z0ey.de>

Containers/docker-socket-proxy/start.sh

@@ -26,4 +26,4 @@ if [ "$AIO_LOG_LEVEL" != 'debug' ]; then
     set +x
 fi
 
-haproxy -f /tmp/haproxy.cfg -db
+exec haproxy -f /tmp/haproxy.cfg -db

Containers/domaincheck/start.sh

@@ -36,6 +36,4 @@ fi
 lighttpd -tt -f /etc/lighttpd/lighttpd.conf
 
 # Run server
-lighttpd -D -f /etc/lighttpd/lighttpd.conf
-
-exec "$@"
+exec lighttpd -D -f /etc/lighttpd/lighttpd.conf

Containers/watchtower/start.sh

@@ -26,5 +26,3 @@ else
     echo "'CONTAINER_TO_UPDATE' is not set. Cannot update anything."
     exit 1
 fi
-
-exec "$@"