OpenAFS Master Repository branch, master, updated. BP-openafs-stable-1_8_x-642-g55fca11

[Gerrit Code Review]

The following commit has been merged in the master branch:
commit 55fca11421055d0bcee79f118ea2a035393cc6e5
Author: Mark Vitale <mvitale@sinenomine.net>
Date:   Mon Apr 30 18:34:28 2018 -0400

    rx: fix out-of-range value for RX_CONN_NAT_PING
    
    Commit 496fb87372555f6acddd4fd88b03c94c85f48511 ("rx: avoid nat ping
    until connection is attached") introduced functionality to defer turning
    on NAT ping for server connections until after reachability had been
    established for the client.
    
    Unfortunately, this feature could never work correctly because it
    assigned an out-of-range flag value of 256 (0x100) for the u_char flags
    field. Instead of calling this out as an error, both gcc and Solaris cc
    elide this flag so that it is never set in
    rx_SetConnSecondsUntilNatPing(), Furthermore, the test in
    rxi_ConnClearAttachWait() will always fail; therefore
    rxi_ScheduleNatKeepAliveEvent is never called after attach wait has
    ended.
    
    Fortunately, this bug is currently moot - not actually exposed in
    OpenAFS. (It was discovered by inspection). This is because there are
    currently no rx_connection objects in the tree that have both NAT ping
    and checkReach (rx_SetCheckReach) enabled. I also searched git history
    and found no time when this bug could ever have been exposed. This does
    raise the question of why the original commit was needed; but instead of
    reverting the original commit, this commit attempts to fix it.
    
    To prevent problems if NAT ping and checkReach are ever both enabled for
    an rx_connection, enlarge the rx_connection flags member so that the
    RX_CONN_NAT_PING value is no longer out of range.
    
    Change-Id: Ib667ece632f66fa5c63a76398acb3153fed6f9c3
    Reviewed-on: https://gerrit.openafs.org/13041
    Tested-by: BuildBot <buildbot@rampaginggeek.com>
    Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>

 doc/txt/rx-debug.txt |    2 ++
 src/rx/rx.h          |    2 +-
 src/rx/rx_conn.h     |    3 ++-
 src/rx/rx_packet.c   |    2 +-
 4 files changed, 6 insertions(+), 3 deletions(-)

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