Upgrade to CSS4J 0.42.3

Version 0.41.3
--------------
 * Core:
- NSAC impl.: fix a bug parsing descendant selectors when the descendant is an 
  ID selector.
- NSAC implementation: regression: accept IE expressions.
- NSAC implementation: fix a bug in control character escaping.
- NSAC impl.: fix a bug in the parsing of functions with url() arguments.
- NSAC impl.: add equals() and hashCode() to SupportsConditionImpl.
- NSAC impl.: add equals() and hashCode() to selector implementations.
- NSAC impl.: warn about style rules with duplicate selectors in selector list.
- NSAC impl.: fix toString() in pseudo-classes that involve a namespaced 
  universal selector.
- NSAC impl.: improved style declaration error detection and handling, esp. if 
  there are hex colors or unicode ranges involved.
- NSAC impl.: if STARHACK is set, apply it during any declaration parsing, 
  including parseStyleDeclaration (previously was only applied when using 
  parseStyleSheet).
- NSAC implementation: make CSSParser.parseSupportsCondition a bit more robust.
- NSAC impl.: detect not/has/matches selectors lacking function tokenization.
- NSAC implementation: more meaningful error message for wrong hex colors.
- NSAC impl.: more meaningful error message when processing unexpected token 
  before '@'.
- NSAC impl.: add @formatter:off/on annotations to a couple important comments, 
  to avoid losing formatting.
- NSAC impl.: CSSParserTest: remove a couple bogus exception declarations.
- Remove duplicate 'dir' selector in the first rule of the html5 user agent 
  sheet.
- DOM impl.: avoid creating elements and attributes with bad names, instead of 
  escaping them later.
- DOM impl.: allow LINK elements in body.
- DOM impl.: allow META elements in body if the itemprop attribute is present.
- DOM impl.: if StrictErrorChecking is set to false, do not check for errors 
  when appending a META element to any element in HTML documents.
- DOM impl.: throw namespace errors when creating elements and attributes with
  namespace problems (Exceptions were of the wrong type).
- Fix a bug in OMMediaList.setMediaText() (previous media were not reset).
- MediaQueryFactory: adjust the equals() and hashCode() methods to ignore the 
  order of queries, being consistent with analogous methods in OMMediaList.
- Initial support for referrer policy when loading external style sheets.
- CSSOM: * introduce this library's own StyleSheetList interface. *
- CSSOM: fix issues with grid shorthands, including an infinite recursion in the
  grid-template shorthand builder.
- CSSOM: fix issue cloning @font-face rules (sheet URI was not accounted for).
- CSSOM: a lot of rules did not have equals/hashCode methods or were inaccurate.
- CSSOM: fix equals/hashCode of URI values exported to another style sheet.
- CSSOM: use STARHACK in CSSStyleDeclaration.setCssText if compliance mode is 
  LENIENT.
- CSSOM: support setCssText(String) in @media rules.
- CSSOM: clean up setCssText() in @supports rules.
- CSSOM: account for all declaration rules in 
  AbstractCSSStyleSheet.hasRuleErrorsOrWarnings().
- CSSOM: CSSConditionRule.setConditionText(String) now throws a DOMException.
- CSSOM: OMCSSValueList: ExtendedCSSValueList already extends CSSValueList.
- CSSOM: add clone() to DOMStringListImpl.
- CSSOM: add more information when producing some DOMExceptions.
- CSSOM: change visibility of class WrappedCSSStyleDeclaration to package.
- CSSOM: assorted additional tests.

 * Dom4j module:
- Implement the new StyleSheetList interface.
- Support referrer policy.

 * Agent module:
- Support referrer policy.

Version 0.42.2
--------------
 * Core:
- NSAC: add SAC_UNICODE_WILDCARD constant to LexicalUnit2.
- NSAC implementation: support for unicode ranges.
- NSAC impl.: add method parseDeclarationRule(InputSource) to CSSParser.
- NSAC impl.: apply the progid-hack only to properties ending with 'filter'.
- NSAC impl.: fix the detection of @charset rules put in the wrong place.
- NSAC implementation: better error recovery when parsing rules.
- NSAC implementation: CSSParseException columns start at 1.
- NSAC impl.: tests: split parseProperty() tests off DeclarationParserTest.
- TokenProducer: add helper constant for CHAR_QUESTION_MARK.
- DOM impl.: more compliant handling of attributes and attribute node maps.
- DOM impl.: look at supplied document type when creating a new document.
- DOM impl.: fix a data insertion bug in Text nodes.
- DOM impl.: fix remnants of namespace handling that was still HTML-centric.
- DOM impl.: remove the tentative support for adoptNode(), which cannot be 
  easily supported by this implementation.
- DOMDocument: avoid taking a branch (cleanup).
- DOM wrapper: avoid NPE when retrieving computed css values.
- CSSOM: support unicode range values, introducing the CSSUnicodeRangeValue 
  interface.
- CSSOM: use the new CSSParser.parseDeclarationRule(InputSource) method.
- CSSOM: add missing hashCode() and equals() methods to some CSSValues.
- CSSOM: fix bad cssText serialization for some rules when they are empty.
- CSSOM: some declaration rules were not passing property errors to its 
  declaration error handler.
- CSSOM: rename SheetErrorHandler.ruleParsingError to ruleParseError.
- CSSOM: add ruleParseWarning(CSSRule, CSSParseException) to SheetErrorHandler.
- CSSOM: add tests about retrieving non-specified properties.
- CSSOM: add some tests for a few at-rules.
- Add initial value for the unicode-range property.
- Move unit test configuration from AllTests to new TestConfig class.

 * Dom4j module:
- XHTMLDocument: avoid taking a branch (cleanup).
- XHTMLDocumentTest: add a test for isSafeOrigin.

Version 0.42.1
--------------
 * Core:
- NSAC: (another) small change for better wording in package description.
- NSAC implementation: more strict detection of invalid identifiers.
- TokenProducer: add a more flexible procedure to add characters to words.
- DOM implementation: support computing styles for XML documents.
- DOM implementation: fix the processing of ID attributes in xml documents.
- DOM impl.: synchronize methods to populate getElementsByTagName and 
  getElementsByClassName node lists.
- DOM impl.: add a few more non-CSS presentational hints to html elements.
- Add a SAXParserFactory ctor argument to XMLDocumentBuilder, with a get method.
- XMLDocumentBuilder: get the isNamespaceAware() and isValidating() from the 
  parser factory.
- DOM Wrapper: support xml style processing and allow changing text nodes.
- CSSOM: support for environment variables, introducing the CSSEnvVariableValue 
  interface.
- CSSOM: remove unnecessary method getParent(int) from SupportsCondition.
- CSSOM: remove an empty conditional at BaseDocumentCSSStyleSheet.
- Fix the merging of the document sheets (was being done multiple times).
- Fix a table formatting bug in the SimpleBoxModel. (not a well-tested code 
  path, other issues are likely to remain)

 * Dom4j module:
- Adapt to latest changes in core module.
- Add a few non-CSS presentational hints.
- Fix the merging of the document sheets (was being done multiple times).
- Add an override to avoid throwing an exception when using the XML builder.