use the serial number is incremented and written out to the file again.
The default filename consists of the CA certificate file base name with
-".srl" appended. For example if the CA certificate file is called
-"mycacert.pem" it expects to find a serial number file called "mycacert.srl".
+F<.srl> appended. For example if the CA certificate file is called
+F<mycacert.pem> it expects to find a serial number file called
+F<mycacert.srl>.
=item B<-CAcreateserial>