tdf#42949 Fix IWYU warnings: boost/optional in include/

Found with bin/find-unneeded-includes a few low hanging
boost/optional headers.
This gets us about 75M includebloat reduction; still much to go

Change-Id: I5c737631767970f9145609aad298a5d11e3fed65
Reviewed-on: https://gerrit.libreoffice.org/59840
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.co.uk>

desktop/source/deployment/dp_log.cxx

@@ -34,7 +34,7 @@
 #include <com/sun/star/io/IOException.hpp>
 #include <com/sun/star/io/XSeekable.hpp>
 #include <stdio.h>
-
+#include <boost/optional.hpp>
 
 using namespace ::com::sun::star;
 using namespace ::com::sun::star::uno;

desktop/source/deployment/registry/dp_backend.cxx

@@ -44,7 +44,7 @@
 #include <com/sun/star/sdbc/XResultSet.hpp>
 #include <com/sun/star/sdbc/XRow.hpp>
 #include <unotools/tempfile.hxx>
-
+#include <boost/optional.hpp>
 
 using namespace ::dp_misc;
 using namespace ::com::sun::star;

include/comphelper/unwrapargs.hxx

@@ -25,7 +25,8 @@
 #include <com/sun/star/uno/XInterface.hpp>
 #include <com/sun/star/lang/IllegalArgumentException.hpp>
 #include <cppu/unotype.hxx>
-#include <boost/optional.hpp>
+
+namespace boost { template <class T> class optional; }
 
 namespace comphelper {
 

include/editeng/editeng.hxx

@@ -41,9 +41,10 @@
 #include <o3tl/typed_flags_set.hxx>
 #include <svl/languageoptions.hxx>
 #include <vcl/errcode.hxx>
-#include <boost/optional.hpp>
 #include <functional>
 
+namespace boost { template <class T> class optional; }
+
 namespace com { namespace sun { namespace star {
   namespace linguistic2 {
     class XSpellChecker1;

include/sax/tools/converter.hxx

@@ -22,8 +22,6 @@
 
 #include <sax/saxdllapi.h>
 
-#include <boost/optional/optional.hpp>
-
 #include <sal/types.h>
 #include <rtl/ustring.hxx>
 #include <rtl/ustrbuf.hxx>
@@ -31,6 +29,7 @@
 #include <com/sun/star/util/MeasureUnit.hpp>
 #include <tools/color.hxx>
 
+namespace boost { template <class T> class optional; }
 
 namespace com { namespace sun { namespace star {
     namespace uno {

include/toolkit/controls/unocontrols.hxx

@@ -58,7 +58,7 @@
 #include <memory>
 #include <vector>
 
-#include <boost/optional.hpp>
+namespace boost { template <class T> class optional; }
 
 class ImageHelper
 {

include/unotools/historyoptions.hxx

@@ -20,7 +20,6 @@
 #ifndef INCLUDED_UNOTOOLS_HISTORYOPTIONS_HXX
 #define INCLUDED_UNOTOOLS_HISTORYOPTIONS_HXX
 
-#include <boost/optional.hpp>
 #include <unotools/unotoolsdllapi.h>
 #include <sal/types.h>
 #include <com/sun/star/uno/Sequence.h>
@@ -29,6 +28,8 @@
 #include <unotools/options.hxx>
 #include <memory>
 
+namespace boost { template <class T> class optional; }
+
 // The method GetList() returns a list of property values.
 // Use follow defines to separate values by names.
 

sax/source/tools/converter.cxx

@@ -27,6 +27,7 @@
 #include <com/sun/star/util/Duration.hpp>
 #include <com/sun/star/util/Time.hpp>
 #include <com/sun/star/uno/Sequence.hxx>
+#include <boost/optional.hpp>
 
 #include <rtl/ustrbuf.hxx>
 #include <rtl/math.hxx>

sfx2/source/doc/SfxDocumentMetaData.cxx

@@ -78,6 +78,7 @@
 #include <sfx2/docfile.hxx>
 #include <sax/tools/converter.hxx>
 #include <i18nlangtag/languagetag.hxx>
+#include <boost/optional.hpp>
 
 #include <utility>
 #include <vector>

unotools/source/config/historyoptions.cxx

@@ -37,6 +37,7 @@
 #include <comphelper/configurationhelper.hxx>
 #include <comphelper/processfactory.hxx>
 #include <tools/diagnose_ex.h>
+#include <boost/optional.hpp>
 
 using namespace ::std;
 using namespace ::utl;