tcpdir should be NETPATHLEN bytes long, not 64. It ensures
that overflow error is consistent with the system limit.

Reference: /n/sources/patch/applied/hget-tcpdir
Date: Mon Apr  5 23:19:31 CES 2004

--- /sys/src/cmd/hget.c	Mon Apr  5 23:19:31 2004
+++ /sys/src/cmd/hget.c	Mon Apr  5 23:19:31 2004
@@ -61,7 +61,7 @@
 
 int	verbose;
 char	*net;
-char	tcpdir[64];
+char	tcpdir[NETPATHLEN];
 int	headerprint;
 
 struct {