The xml-merge task used by the docs.licenses.merge Galleon package generates incorrect output for the 'source' elements on Windows.

https://github.com/wildfly/galleon-plugins/blob/main/galleon-plugins/src/main/java/org/wildfly/galleon/plugin/config/XmlMerge.java#L99 converts paths to URIs, which results in '/' being used as the separator char.

But then https://github.com/wildfly/galleon-plugins/blob/main/galleon-plugins/src/main/java/org/wildfly/galleon/plugin/config/XmlMerge.java#L120 passes the host filesystem separator char.

The merger.xsl in WildFly can fix this by ignoring the fileSeparator param and just using '/'. XmlMerge itself needs to keep passing the param as older versions of merger.xsl will expect it.