extern int clmacro_count; /* Number of command line macros */
extern uschar *clmacros[]; /* Copy of them, for re-exec */
extern BOOL commandline_checks_require_admin; /* belt and braces for insecure setups */
-extern ulong connection_id; /* per-daemon connection number */
+extern uint64_t connection_id; /* connection number */
extern int connection_max_messages;/* Max down one SMTP connection */
extern FILE *config_file; /* Configuration file */
extern const uschar *config_filename; /* Configuration file name */