int string_datestamp_offset= -1;
int string_datestamp_length= 0;
int string_datestamp_type = -1;
-uschar *submission_domain = NULL;
-uschar *submission_name = NULL;
+const uschar *submission_domain = NULL;
+const uschar *submission_name = NULL;
int syslog_facility = LOG_MAIL;
uschar *syslog_processname = US"exim";
uschar *system_filter = NULL;