lxc-download.in / allow setting keyserver from env

Checks if DOWNLOAD_KEYSERVER has already been set in the environment before setting a value

Signed-off-by: Tai Kedzierski <dch.tai@gmail.com>

templates/lxc-download.in

@@ -34,7 +34,6 @@ DOWNLOAD_FLUSH_CACHE="false"
 DOWNLOAD_FORCE_CACHE="false"
 DOWNLOAD_INTERACTIVE="false"
 DOWNLOAD_KEYID="0xE7FB0CAEC8173D669066514CBAEFF88C22F6E216"
-DOWNLOAD_KEYSERVER="hkp://pool.sks-keyservers.net"
 DOWNLOAD_LIST_IMAGES="false"
 DOWNLOAD_MODE="system"
 DOWNLOAD_READY_GPG="false"
@@ -54,9 +53,13 @@ LXC_NAME=
 LXC_PATH=
 LXC_ROOTFS=
 
-# Deal with GPG over http proxy
-if [ -n "${http_proxy:-}" ]; then
-    DOWNLOAD_KEYSERVER="hkp://p80.pool.sks-keyservers.net:80"
+if [ -z "${DOWNLOAD_KEYSERVER+x}" ]; then
+	DOWNLOAD_KEYSERVER="hkp://pool.sks-keyservers.net"
+
+	# Deal with GPG over http proxy
+	if [ -n "${http_proxy:-}" ]; then
+	    DOWNLOAD_KEYSERVER="hkp://p80.pool.sks-keyservers.net:80"
+	fi
 fi
 
 # Make sure the usual locations are in PATH