Fix compatibility with C++17.

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit ab599e34e8)

kab/addressbook.cpp

@@ -100,7 +100,7 @@ const int AddressBook::Entry::NoOfFields
 =sizeof(AddressBook::Entry::Fields)/sizeof(AddressBook::Entry::Fields[0]);
 
 struct QStringLess
-  : public binary_function<const TQString&, const TQString&, bool>
+  : public std::function<bool(const TQString&, const TQString&)>
 {
   /** The function operator, inline. */
   bool operator()(const TQString& x, const TQString& y) const

kab/qconfigDB.h

@@ -19,6 +19,7 @@
 namespace std { }
 using namespace std;
 
+#include <functional>
 #include <list>
 #include <map>
 #include <tqwidget.h>
@@ -43,7 +44,7 @@ class TQTextStream;
  * it is called with.
  */
 struct QCStringLess 
-  : public binary_function<const TQCString&, const TQCString&, bool> 
+  : public std::function<bool(const TQCString&, const TQCString&)>
 {
   /**
    * The function operator, inline.

tdeio/tdefile/kpropertiesdialog.cpp

@@ -2146,7 +2146,7 @@ void KFilePermissionsPropsPlugin::slotShowAdvancedPermissions() {
       d->fileSystemSupportsACLs = fileSystemSupportsACL( pathCString );
   }
   if ( d->fileSystemSupportsACLs  ) {
-    std::for_each( theNotSpecials.begin(), theNotSpecials.end(), std::mem_fun( &TQWidget::hide ) );
+    std::for_each( theNotSpecials.begin(), theNotSpecials.end(), std::mem_fn( &TQWidget::hide ) );
     extendedACLs = new KACLEditWidget( mainVBox );
     if ( d->extendedACL.isValid() && d->extendedACL.isExtended() )
       extendedACLs->setACL( d->extendedACL );