Changes from previous:
Changes for 0.22 Tue Oct 4 21:44:32 2011
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* Resolve possible security problem [http://goo.gl/YzHRU]
where a '::' prefixed module can 'jump' out of @INC
Changes for 0.20 Mon Aug 1 19:13:44 2011
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* Resolve [rt #69886] reported by Laurent Dami,
trailing '::' silently ignored
Changes for 0.18 Tue Mar 2 15:54:30 2010
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* Documentation fix from Michael Schwern RT #55123
beff24d523