Doc: Fix documentation warnings

These warnings slipped in during a time period where documentation
testing in the CI was disabled.

src/network/kernel/qhostinfo.cpp:254: (qdoc) warning: clang couldn't
    find function when parsing \fn template<typename Functor>
    int QHostInfo::lookupHost(const QString &name, Functor functor)

src/widgets/widgets/qcheckbox.cpp:102: (qdoc) warning: clang couldn't
    find function when parsing
    \fn void QCheckBox::stateChanged(Qt::CheckState state)

src/corelib/kernel/qcoreapplication.cpp:2769: (qdoc) warning: clang
    couldn't find function when parsing
    \fn template<typename Functor> void
        QCoreApplication::requestPermission(
        const QPermission &permission, Functor functor)

src/corelib/serialization/qxmlstream.cpp:3806: (qdoc) warning: clang
    couldn't find function when parsing
    \fn bool QXmlStreamAttributes::hasAttribute(
        const QString &qualifiedName) const

src/corelib/text/qtliterals.qdoc:11: (qdoc) warning: Multiple topic
    commands found in comment: \namespace and \headerfile.

Change-Id: I38c605f358dbca1ef3e2bfe20a6424f7a4d44b4a
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
(cherry picked from commit 37dc52d4f24c216811cf14ceb8aeaa13766b249d)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/src/corelib/kernel/qcoreapplication.cpp b/src/corelib/kernel/qcoreapplication.cpp
index 579049814a..fd993eddb4 100644
--- a/src/corelib/kernel/qcoreapplication.cpp
+++ b/src/corelib/kernel/qcoreapplication.cpp
@@ -2768,7 +2768,7 @@ Qt::PermissionStatus QCoreApplication::checkPermission(const QPermission &permis
 
 /*!
     \fn template<typename Functor> void QCoreApplication::requestPermission(
-        const QPermission &permission, Functor functor)
+        const QPermission &permission, Functor &&functor)
 
     Requests the given \a permission.