invalid characters in CVS changelog cause build failure

Per my message to maven-users:

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Some of our developers periodically check in code and write CVS commit
messages containing invalid characters. For example, people will put in
Ctrl-V+C accidentally, which causes our continuous build to fail with:

BUILD FAILED
File...... /home/jdunn/.maven/cache/maven-xdoc-plugin-1.8/plugin.jelly
Element... x:parse
Line...... 120
Column.... 48
Error on line 12 of document
file:/home/jdunn/devel/util/target/changelog.xml :An invalid XML
character (Unicode: 0x16) was found in the CDATA section.
Nestedexception: An invalid XML character (Unicode: 0x16) was found in
the CDATA section.
Total time: 19 seconds
Finished at: Fri Jan 28 16:55:21 EST 2005
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