[libbsd 6/7] Define IN_HISTORICAL_NETS for kernel space

[Sebastian Huber]

Required by FreeBSD commit:

Author: Mike Karels <karels at FreeBSD.org>
Date:   Tue Oct 26 22:01:09 2021 -0500

    kernel: deprecate Internet Class A/B/C

    Hide historical Class A/B/C macros unless IN_HISTORICAL_NETS is defined;
    define it for user level.  Define IN_MULTICAST separately from IN_CLASSD,
    and use it in pf instead of IN_CLASSD.  Stop using class for setting
    default masks when not specified; instead, define new default mask
    (24 bits).  Warn when an Internet address is set without a mask.

    MFC after:      1 month
    Reviewed by:    cy
    Differential Revision: https://reviews.freebsd.org/D32708
---
 rtemsbsd/include/machine/rtems-bsd-kernel-space.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/rtemsbsd/include/machine/rtems-bsd-kernel-space.h b/rtemsbsd/include/machine/rtems-bsd-kernel-space.h
index 09bcecf1..c4c70c75 100644
--- a/rtemsbsd/include/machine/rtems-bsd-kernel-space.h
+++ b/rtemsbsd/include/machine/rtems-bsd-kernel-space.h
@@ -55,6 +55,9 @@
 /* General define to activate BSD kernel parts */
 #define _KERNEL 1
 
+/* REVIEW-AFTER-FREEBSD-BASELINE-UPDATE */
+#define IN_HISTORICAL_NETS
+
 #include <machine/rtems-bsd-version.h>
 #include <machine/rtems-bsd-kernel-namespace.h>
 
-- 
2.35.3