[issue2924] Revert copy_reg rename in 2.6

[Brett Cannon]

New submission from Brett Cannon <brett at python.org>:

The rename of copy_reg in 2.6 needs to reverted, leaving on a note in the 
docs.

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components: Library (Lib)
messages: 67094
nosy: brett.cannon
priority: release blocker
severity: normal
status: open
title: Revert copy_reg rename in 2.6
type: behavior
versions: Python 2.6

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