OpenAFS Master Repository branch, master, updated. openafs-devel-1_9_1-121-g3daa6e9

[Gerrit Code Review]

The following commit has been merged in the master branch:
commit 3daa6e97330d23ae46c4389e4041c61c1a1d76d9
Author: Cheyenne Wills <cwills@sinenomine.net>
Date:   Tue Nov 16 10:55:30 2021 -0700

    LINUX-5.16: Use linux/stdarg.h if available
    
    Global use of the compiler option '-isystem' was removed from the top
    level Makefile with Linux commit ('isystem: delete global -isystem
    compile option' 04e85bbf7). This results with an error due to not
    finding "stdarg.h" when building the openafs kernel module.
    
     .../src/rx/rx_kcommon.h:143:12: fatal error: stdarg.h: No such file or
                                     directory
       143 | #  include "stdarg.h"
           |            ^~~~~~~~~~
    
    Linux-5.15, introduced a copy of stdarg.h as 'linux/stdarg.h' in commit
    ('isystem: ship and use stdarg.h' c0891ac15)
    
    Add a test for the linux/stdarg.h include file and if available, use
    "linux/stdarg.h" instead of "stdarg.h" within the Linux kernel module.
    
    Change-Id: I5215182c8240034bd739688a88a9410b74f93c8f
    Reviewed-on: https://gerrit.openafs.org/14844
    Tested-by: BuildBot <buildbot@rampaginggeek.com>
    Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>

 src/cf/linux-kernel-header.m4 | 1 +
 src/rx/rx_kcommon.h           | 6 +++++-
 2 files changed, 6 insertions(+), 1 deletion(-)

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