Log Message:
Update from version 2.23nb1 to 1.231.

Upstream changes:

2.231 Thu Nov 20 04:59:08 CET 2008
	- work around 5.10.0 magic bugs where manipulating magic values
          (such as $1) would permanently damage them as perl would
          ignore the magicalness, by making a full copy of the string,
          reported by Dmitry Karasik.
        - work around spurious wanrings under older perl 5.8's.