Revert "templates/lxc-download.in: use GPG option --receive-keys inst…

…ead of --recv-keys"

This reverts commit 409040e.

Testing of both options show identical behavior but receive-keys does
not exist on older releases, so let's revert this.

Closes #3510

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>

templates/lxc-download.in

@@ -135,7 +135,7 @@ gpg_setup() {
   success=
   for _ in $(seq 3); do
     if gpg --keyserver "${DOWNLOAD_KEYSERVER}" ${DOWNLOAD_GPG_PROXY:-} \
-      --receive-keys "${DOWNLOAD_KEYID}" >/dev/null 2>&1; then
+      --recv-keys "${DOWNLOAD_KEYID}" >/dev/null 2>&1; then
       success=1
       break
     fi