doc: Fix all remaining non-link qdoc warnings

The fixes included adding missing '!' characters to qdoc comment
markers, correct misspelled words, adding documentation for an
anonymous enum type, and replacing Q_QDOC with Q_CLANG_QDOC.

There remain 12 qdoc link warnings in QtBase.

Change-Id: I00447722e6e029f5aed273b3cd571cef33c119b4
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>

src/corelib/thread/qthread.cpp

@@ -891,7 +891,7 @@ bool QThread::isInterruptionRequested() const
     return d->running && !d->finished && !d->isInFinish;
 }
 
-/*
+/*!
     \fn template <typename Function, typename... Args> QThread *QThread::create(Function &&f, Args &&... args)
     \since 5.10
 
@@ -915,7 +915,7 @@ bool QThread::isInterruptionRequested() const
     \sa start()
 */
 
-/*
+/*!
     \fn template <typename Function> QThread *QThread::create(Function &&f)
     \since 5.10
 

src/corelib/thread/qthread.h

@@ -113,7 +113,7 @@ public:
     bool event(QEvent *event) override;
     int loopLevel() const;
 
-#ifdef Q_QDOC
+#ifdef Q_CLANG_QDOC
     template <typename Function, typename... Args>
     static QThread *create(Function &&f, Args &&... args);
     template <typename Function>
@@ -128,7 +128,7 @@ public:
     static QThread *create(Function &&f);
 #    endif // QTHREAD_HAS_VARIADIC_CREATE
 #  endif // QT_CONFIG(cxx11_future)
-#endif // Q_QDOC
+#endif // Q_CLANG_QDOC
 
 public Q_SLOTS:
     void start(Priority = InheritPriority);
@@ -169,7 +169,7 @@ private:
 
 #if QT_CONFIG(cxx11_future)
 
-#if defined(QTHREAD_HAS_VARIADIC_CREATE)
+#if defined(QTHREAD_HAS_VARIADIC_CREATE) || defined(Q_CLANG_QDOC)
 // C++17: std::thread's constructor complying call
 template <typename Function, typename... Args>
 QThread *QThread::create(Function &&f, Args &&... args)

src/corelib/tools/qmap.cpp

@@ -1230,14 +1230,14 @@ void QMapDataBase::freeData(QMapDataBase *d)
 */
 
 /*!
-  \fn template <class Key, class T> QPair<iterator, iterator> QMap<Key, T>::equal_range(const Key &key)
+  \fn template <class Key, class T> QPair<typename QMap<Key, T>::iterator, typename QMap<Key, T>::iterator> QMap<Key, T>::equal_range(const Key &key)
 
   Returns a pair of iterators delimiting the range of values \c{[first, second)}, that
   are stored under \a key.
 */
 
 /*!
-    \fn template <class Key, class T> QPair<const_iterator, const_iterator> QMap<Key, T>::equal_range(const Key &key) const
+    \fn template <class Key, class T> QPair<typename QMap<Key, T>::const_iterator, typename QMap<Key, T>::const_iterator> QMap<Key, T>::equal_range(const Key &key) const
     \overload
     \since 5.6
 */

src/corelib/tools/qtimezone.cpp

@@ -224,6 +224,20 @@ Q_GLOBAL_STATIC(QTimeZoneSingleton, global_tz);
     \sa QDateTime
 */
 
+/*!
+  \enum QTimeZone::anonymous
+
+  Sane UTC offsets range from -14 to +14 hours.
+  No known zone > 12 hrs West of Greenwich (Baker Island, USA).
+  No known zone > 14 hrs East of Greenwich (Kiritimati, Christmas Island, Kiribati).
+
+  \value MinUtcOffsetSecs
+          -14 * 3600,
+
+  \value MaxUtcOffsetSecs
+          +14 * 3600
+*/
+
 /*!
     \enum QTimeZone::TimeType
 

src/network/kernel/qnetworkinterface.cpp

@@ -593,7 +593,7 @@ bool QNetworkAddressEntry::isPermanent() const
     \value Ethernet             IEEE 802.3 Ethernet interfaces, though on many
                                 systems other types of IEEE 802 interfaces may also
                                 be detected as Ethernet (especially Wi-Fi).
-    \value WiFi                 IEEE 802.11 Wi-Fi interfaces. Note that on some
+    \value Wifi                 IEEE 802.11 Wi-Fi interfaces. Note that on some
                                 systems, QNetworkInterface may be unable to
                                 distinguish regular Ethernet from Wi-Fi and will
                                 not return this enum value.