Add possibility of DENYNONE mode to nopen() intro comment.

src/sbbs3/nopen.c

@@ -39,10 +39,10 @@
 #include "crc32.h"
 
 /****************************************************************************/
-/* Network open function. Opens all files DENYALL or DENYWRITE depending on */
-/* access, and retries LOOP_NOPEN number of times if the attempted file is	*/
-/* already open or denying access  for some other reason. All files are 	*/
-/* opened in BINARY mode.													*/
+/* Network open function. Opens all files DENYALL, DENYWRITE, or DENYNONE	*/
+/* depending on access, and retries LOOP_NOPEN number of times if the		*/
+/* attempted file is already open or denying access  for some other reason. */
+/* All files are opened in BINARY mode.										*/
 /****************************************************************************/
 int nopen(const char* str, int access)
 {