```
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.