netstat: INFO_GUTS1(): don't treat EACCES as error

The reason is that debugfs is accessible only by root user:
_PATH_SYS_BLUETOOTH_L2CAP  /sys/kernel/debug/bluetooth/l2cap
_PATH_SYS_BLUETOOTH_RFCOMM /sys/kernel/debug/bluetooth/rfcom

URL: https://www.kernel.org/doc/Documentation/filesystems/debugfs.txt
URL: https://bugzilla.redhat.com/show_bug.cgi?id=1162284

netstat.c

@@ -177,7 +177,7 @@ FILE *procinfo;
 #define INFO_GUTS1(file,name,proc,prot)			\
   procinfo = proc_fopen((file));			\
   if (procinfo == NULL) {				\
-    if (errno != ENOENT) {				\
+    if (errno != ENOENT && errno != EACCES) {		\
       perror((file));					\
       return -1;					\
     }							\