CASTOR-5105 RFE: Improve the const correctness of Cns_deleteclass()

Fixed.

h/Cns_api.h

@@ -246,7 +246,7 @@ EXTERN_C int Cns_closedir (Cns_DIR *);
 EXTERN_C int Cns_creat (const char *, mode_t);
 EXTERN_C int Cns_creatx (const char *, mode_t, struct Cns_fileid *);
 EXTERN_C int Cns_delcomment (const char *);
-EXTERN_C int Cns_deleteclass (char *, int, char *);
+EXTERN_C int Cns_deleteclass (const char *, int, const char *);
 EXTERN_C int Cns_dropsegs (const char *, struct Cns_fileid *);
 EXTERN_C int Cns_delsegbycopyno (const char *, struct Cns_fileid *, int);
 EXTERN_C int Cns_du (const char *, int, u_signed64 *, u_signed64 *);

ns/Cns_deleteclass.c

@@ -16,7 +16,7 @@
 #include "serrno.h"
 
 int
-Cns_deleteclass(char *server, int classid, char *class_name)
+Cns_deleteclass(const char *server, int classid, const char *class_name)
 {
   int c;
   char func[16];

ns/Cns_deleteclass.man

@@ -9,9 +9,9 @@ Cns_deleteclass \- delete a fileclass definition in the name server
 .br
 \fB#include "Cns_api.h"\fR
 .sp
-.BI "int Cns_deleteclass (char *" server ,
+.BI "int Cns_deleteclass (const char *" server ,
 .BI "int " classid ,
-.BI "char *" class_name )
+.BI "const char *" class_name )
 .SH DESCRIPTION
 .B Cns_deleteclass
 deletes a fileclass definition in the name server.