Patch to fix JSON control character encoding bug (#3345 "to_json does not escape unicode characters")

[Dwayne Litzenberger]

Hi there!

I've attached a patch that makes ActiveSupport::JSON escape the
control characters \x00-\x1f, per RFC 4627.

There are two versions of the patch: One against 2-3-stable, and one
against master (there's no real difference between them, but git-am
seems to be very picky).

See the ticket at:

https://rails.lighthouseapp.com/projects/8994/tickets/3345-to_json-does-not-escape-unicode-characters

Cheers,
- Dwayne

Dwayne Litzenberger
Lead Healthcare IT Developer, Infonium Inc.
Office +1-613-722-0711 x29
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