reference syscall.h in pledge.2

[Jan Stary]

Does it make sense to reference the syscall numbers in pledge(2)?

        Jan


--- /usr/src/lib/libc/sys/pledge.2      Thu Oct 15 00:39:04 2015
+++ ./pledge.2  Wed Oct 21 09:41:26 2015
@@ -468,6 +468,9 @@ All other paths will return
 .Er ENOENT .
 .Sh RETURN VALUES
 .Rv -std
+.Sh FILES
+.Pa /usr/include/sys/syscall.h
+defines the syscall numbers.
 .Sh ERRORS
 .Fn pledge
 will fail if: