Improve comment for struct BufferDesc.

Thomas Munro <tmunro@postgresql.org>

Commit: 049d9b872db8a24b45709dbaed9a1051e92ed513
Author: Thomas Munro <tmunro@postgresql.org>
Date: 2021-03-11T03:38:45Z
Releases: 14.0
Improve comment for struct BufferDesc.

Add a note that per-buffer I/O condition variables currently live
outside the BufferDesc struct.  Follow-up for commit d8725104.

Reported-by: Julien Rouhaud <rjuju123@gmail.com>
Discussion: https://postgr.es/m/20210311031118.hucytmrgwlktjxgq%40nol

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PathChange+/−
src/include/storage/buf_internals.h modified +4 −0

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