Just a small thing for 6.3 ...

May I suggest a minor change?

- "Keep the directory tidy"

The "data/base/*/" directories looks awful, almost as bad as the
c:\windows dir on my dos partition... ;-) All types of files are
just thrown in, without any structure. It would be nice if the
files were put into separate subdirs:
data/base/mydb/{systables,tables,indexes,sequences,tmp} etc.

Sometimes my temporary sort files grow too big, and I would love to
be able to symlink tmp/ to another partition.

/* m */