Add option to include WAL in base backup

Magnus Hagander <magnus@hagander.net>

Commit: 507069de6dbe18c2163f27fbc780673eef8c5622
Author: Magnus Hagander <magnus@hagander.net>
Date: 2011-01-30T20:30:09Z
Releases: 9.1.0
Add option to include WAL in base backup

When included, this makes the base backup a complete working
"clone" of the initial database, ready to have a postmaster
started against it without the need to set up any log archiving
or similar.

Magnus Hagander, reviewed by Fujii Masao and Heikki Linnakangas

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