Merge pull request #123929 from munnerz/fixup-allow-host-rsyncd

build/rsyncd: replace newlines with spaces when generating ALLOW_HOST list

build/common.sh

@@ -611,7 +611,7 @@ function kube::build::start_rsyncd_container() {
   V=3 kube::log::status "Starting rsyncd container"
   kube::build::run_build_command_ex \
     "${KUBE_RSYNC_CONTAINER_NAME}" -p 127.0.0.1:"${KUBE_RSYNC_PORT}":"${KUBE_CONTAINER_RSYNC_PORT}" -d \
-    -e ALLOW_HOST="$(${IPTOOL} | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*' | grep -v '127.0.0.1')" \
+    -e ALLOW_HOST="$(${IPTOOL} | grep -Eo 'inet (addr:)?([0-9]*\.){3}[0-9]*' | grep -Eo '([0-9]*\.){3}[0-9]*' | grep -v '127.0.0.1' | tr '\n' ' ')" \
     -- /rsyncd.sh >/dev/null
 
   local mapped_port