cln: add VLS_CLN_VERSION env var

- required for newer remote_hsmd_socket versions
- keep backward compatible by having GREENLIGHT_VERSION
Signed-off-by: Lakshya Singh <lakshay.singh1108@gmail.com>

lightningd/entrypoint.sh

@@ -5,6 +5,7 @@ cp -u /testnet-config ${LIGHTNINGD_DATA}/testnet-config
 cp -u /regtest-config ${LIGHTNINGD_DATA}/regtest-config
 
 export GREENLIGHT_VERSION=$(lightningd --version)
+export VLS_CLN_VERSION=$(lightningd --version)
 
 if [ $(echo "$1" | cut -c1) = "-" ]; then
   echo "$0: assuming arguments for lightningd"