git: setbuf.3: Mention stdbuf(1) and update HISTORY & BUGS sections

[Aaron LI]

commit f3721a17cb3d4a3a9c8237b59ab93e9ba8b86b00
Author: Aaron LI <aly at aaronly.me>
Date:   Sat Jan 2 10:56:31 2021 +0800

    setbuf.3: Mention stdbuf(1) and update HISTORY & BUGS sections
    
    Obtained-from: FreeBSD
    Reported-by: swildner

Summary of changes:
 lib/libc/stdio/setbuf.3 | 33 ++++++++++++++++++++-------------
 1 file changed, 20 insertions(+), 13 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/f3721a17cb3d4a3a9c8237b59ab93e9ba8b86b00


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