wagon-http uses old and cranky JTidy implementation

JTidy version "4aug2000r7-dev" contains obsolete org.w3c.dom.* and org.xml.sax.* classes which arguably should not be there at all. This can cause java.lang.LinkageError to occur.

The JTidy project at <http://jtidy.sourceforge.net/> has seen a new lease of life recently, and there are new builds that no longer include these classes.

So, the JTidy developers need to be encouraged to deploy to the central maven repo so that wagon can then make use of the new jtidy artifact.

I found this while hacking Continuum 1.3.4 so that it deploys and runs in JBoss 5.1 and Java 6. I've replaced the old jtidy with jtidy-r918.jar from the sourceforge site.