Lifted 2-letter language code restriction. It is now possible to create pages with a language code of zh-tw, for instance. It is still possible to use the short en, de as well. This fixes http://issues.apache.org/bugzilla/show_bug.cgi?id=28974
Changed paths:
lenya/branches/BRANCH_1_2_X/src/java/org/apache/lenya/cms/publication/DefaultDocumentBuilder.java