depends: expat 2.2.7
90457de2d4f0
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Description

depends: expat 2.2.7

Summary:

Major changes in expat 2.2.7:

 - #186 #262 Fix extraction of namespace prefixes from XML names;
   XML names with multiple colons could end up in the
   wrong namespace, and take a high amount of RAM and CPU
   resources while processing, opening the door to use for
   denial-of-service attacks
 - #227 Autotools: Add --without-examples and --without-tests

Backport of core PR16270.

Test Plan: Run the Gitian builds.

Reviewers: #bitcoin_abc, deadalnix

Reviewed By: #bitcoin_abc, deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D5631