[patch]Use BUFSIZE instead of hard-code in netcat.c

[Nan Xiao]

Hi tech@,

Use BUFSIZE instead of hard-code in netcat.c, FYI. Thanks!

Best Regards
Nan Xiao

Index: netcat.c
===================================================================
RCS file: /cvs/src/usr.bin/nc/netcat.c,v
retrieving revision 1.187
diff -u -p -r1.187 netcat.c
--- netcat.c    15 Jul 2017 17:27:39 -0000      1.187
+++ netcat.c    24 Oct 2017 09:03:28 -0000
@@ -564,7 +564,7 @@ main(int argc, char *argv[])
                                 * the regular functions to talk to the caller.
                                 */
                                int rv, plen;
-                               char buf[16384];
+                               char buf[BUFSIZE];
                                struct sockaddr_storage z;

                                len = sizeof(z);