Document environment variable expansion
authorAaron Carroll <aaronc@gelato.unsw.edu.au>
Tue, 7 Oct 2008 09:25:38 +0000 (11:25 +0200)
committerJens Axboe <jens.axboe@oracle.com>
Tue, 7 Oct 2008 09:25:38 +0000 (11:25 +0200)
Add environment variable expansion documentation to HOWTO, and fix
a few nearby typo's while we're at it.

Signed-off-by: Aaron Carroll <aaronc@gelato.unsw.edu.au>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

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