Log Message:
Changes 4.2.3:
This is a bug-fix release. It maintains both forward and backward
compatibility (source and binary) with Qt 4.2.0.

- Configuration/Compilation
    * Fixed architecture detection on UltraSPARC-T1 systems.
    * Fixed compilation on embedded architectures when qreal is not double.
- Documentation
    * Completed documentation for "Implementing Atomic Operations",
      which is useful for people porting Qt to a new hardware architecture.
- Translations
    * Added a new unofficial Portuguese translation courtesy of Helder
      Correia.
- Qt Linguist
    * Made the columns in the phrasebook resizeable.
- lupdate
    * Fixed bug in the .pro parser of lupdate. It should accept backslashes.
    * Fixed a severe slowdown in lupdate. (~400x speedup.)
    * Fixed traversal of subdirectories.
- moc
    * Don't create trigraphs in the generated code for C++ casts.
- uic
    * Fixed a bug that generated excessive margins for Q3GroupBox.