fix for older ssh that does not support Envrionment variable for Include

diyvpn.sh

@@ -36,10 +36,9 @@ generate() {
 
 	idle_timeout="${IDLE_TIMEOUT:-10min}"
 	listen_address="${LISTEN_ADDRESS:?LISTEN_ADDRESS should be set}"
-	header="# Automatically generated by $script_path"
 
 	cat >"$opdir/diyvpnssh-$name.service" <<-EOF
-		$header
+		# Automatically generated by $script_path
 		[Unit]
 		Description=ssh to $name
 		SourcePath=$server_config_rc
@@ -50,12 +49,12 @@ generate() {
 		NotifyAccess=all
 
 		RuntimeDirectory=diyvpn-$name
-		Environment=SSH_CFG_PATH=$server_ssh_cfg
-		ExecStart=ssh -F "$common_ssh_cfg_path" default
+		ExecStartPre=sh -c 'cat "$server_ssh_cfg" "$common_ssh_cfg_path" > %t/diyvpn-$name/ssh_config'
+		ExecStart=ssh -F %t/diyvpn-$name/ssh_config default
 	EOF
 
 	cat >"$opdir/diyvpnact-$name.service" <<-EOF
-		$header
+		# Automatically generated by $script_path
 		[Unit]
 		Description=Socket activator for diyvpn to server $name
 		SourcePath=$server_config_rc
@@ -68,7 +67,7 @@ generate() {
 	EOF
 
 	cat >"$opdir/diyvpnact-$name.socket" <<-EOF
-		$header
+		# Automatically generated by $script_path
 		[Unit]
 		Description=Socket for diyvpn to server $name
 		SourcePath=$server_config_rc