Check for lv_api_do in get_config

qq2clone

@@ -415,6 +415,10 @@ read -r check \
   { echo "Is the database corrupt? No CONFIG table!" 2>/dev/null; 
     exit "$E_config"; }
 
+chmod +x "${QQ2_DIR}/lv_api_do" &>/dev/null ||
+  { echo "lv_api_do is missing from $QQ2_DIR, or has bad permissions";
+    exit "$E_permission"; } >&2
+
 declare -gA OPT
 declare -a opts
 local elem