Adapt to QTextCodec being in Qt6::Core5Compat in Qt 6

The QTextStream::setCodec call with codecForLocale() is unnecessary, that
is the default anyway.

CMakeLists.txt

@@ -27,6 +27,9 @@ include(CMakePackageConfigHelpers)
 include(FeatureSummary)
 
 find_package(Qt${QT_MAJOR_VERSION} ${QT_MIN_VERSION} CONFIG REQUIRED COMPONENTS DBus Network Widgets Svg)
+if (QT_MAJOR_VERSION EQUAL "6")
+    find_package(Qt6 ${QT_MIN_VERSION} CONFIG REQUIRED Core5Compat)
+endif()
 
 find_package(Qt${QT_MAJOR_VERSION}Test ${QT_MIN_VERSION} CONFIG QUIET)
 set_package_properties(Qt${QT_MAJOR_VERSION}Test PROPERTIES

man/kio_man.cpp

@@ -871,8 +871,6 @@ void MANProtocol::constructPath(QStringList& constr_path, QStringList constr_cat
     if (mc.open(QIODevice::ReadOnly))
     {
         QTextStream is(&mc);
-        is.setCodec( QTextCodec::codecForLocale () );
-
         while (!is.atEnd())
         {
             const QString line = is.readLine();

thumbnail/CMakeLists.txt

@@ -147,6 +147,9 @@ target_link_libraries(textthumbnail
     KF5::KIOWidgets
     KF5::SyntaxHighlighting
 )
+if (QT_MAJOR_VERSION EQUAL "6")
+    target_link_libraries(textthumbnail Qt6::Core5Compat)
+endif()
 
 install(TARGETS textthumbnail DESTINATION ${KDE_INSTALL_PLUGINDIR}/kf${QT_MAJOR_VERSION}/thumbcreator)