Doc: Fix linking errors qtbase

Change-Id: I225e59bea0a8eac14fd11ef2b091907ae955c447
Reviewed-by: Topi Reiniö <topi.reinio@qt.io>

src/network/ssl/qpassworddigestor.cpp

@@ -75,7 +75,7 @@ namespace QPasswordDigestor {
     \a salt must always be 8 bytes long!
 
     \note This function is provided for use with legacy applications and all
-    new applications are recommended to use \l {pbkdf2} {PBKDF2}.
+    new applications are recommended to use \l {deriveKeyPbkdf2} {PBKDF2}.
 
     \sa deriveKeyPbkdf2, QCryptographicHash, QCryptographicHash::hashLength
 */

src/testlib/qtestcase.cpp

@@ -2419,7 +2419,7 @@ bool QTest::currentTestFailed()
     Sleeps for \a ms milliseconds, blocking execution of the
     test. qSleep() will not do any event processing and leave your test
     unresponsive. Network communication might time out while
-    sleeping. Use \l qWait() to do non-blocking sleeping.
+    sleeping. Use \l {QTest::qWait()} to do non-blocking sleeping.
 
     \a ms must be greater than 0.
 
@@ -2430,7 +2430,7 @@ bool QTest::currentTestFailed()
     Example:
     \snippet code/src_qtestlib_qtestcase.cpp 23
 
-    \sa qWait()
+    \sa {QTest::qWait()}
 */
 void QTest::qSleep(int ms)
 {

src/testlib/qtestevent.qdoc

@@ -133,7 +133,7 @@
 
     Adds a \a msecs milliseconds delay.
 
-    \sa QTest::qWait()
+    \sa {QTest::qWait()}
 */
 
 /*! \fn void QTestEventList::simulate(QWidget *w)

src/widgets/kernel/qwidget.cpp

@@ -4495,7 +4495,7 @@ void QWidget::setForegroundRole(QPalette::ColorRole role)
     the "color", "background-color", "selection-color",
     "selection-background-color" and "alternate-background-color".
 
-    \sa QApplication::palette(), QWidget::font(), \l {Qt Style Sheets}
+    \sa QApplication::palette(), QWidget::font(), {Qt Style Sheets}
 */
 const QPalette &QWidget::palette() const
 {