Tiny assorted fixes: correct a typo in a comment in vacuumlazy.c, remove

Neil Conway <neilc@samurai.com>

Commit: 03709513477a4991eb78264c4cddbe8c9804e6cb
Author: Neil Conway <neilc@samurai.com>
Date: 2004-04-25T23:50:58Z
Releases: 8.0.0
Tiny assorted fixes: correct a typo in a comment in vacuumlazy.c, remove
some unused #include directives from bufmgr.c, and clarify comments in
bufmgr.h and buf.h

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