RtfAttributeOutput::ParaHyphenZone: use \hyphpar

Previously SvxHyphenZoneItem was serialized to some custom RTF extension
that even our own RTF import ignores since LO 3.5.

Change-Id: Ia99d9750ad0b1a07105eeef2bee07e6fdbfe7876

sw/qa/extras/rtfexport/data/hyphpar.rtf

+{\rtf1\hyphauto1
+\pard\plain AAA\par
+\pard\plain\hyphpar0 BBB\par
+\pard\plain CCC\par
+}

sw/qa/extras/rtfexport/rtfexport.cxx

@@ -872,6 +872,12 @@ DECLARE_RTFEXPORT_TEST(testHyphauto, "hyphauto.rtf")
     CPPUNIT_ASSERT_EQUAL(true, getProperty<bool>(getParagraph(1), "ParaIsHyphenation"));
 }
 
+DECLARE_RTFEXPORT_TEST(testHyphpar, "hyphpar.rtf")
+{
+    // Hyphenation was enabled for all 3 paragraphs, but it should be disabled for the 2nd one.
+    CPPUNIT_ASSERT_EQUAL(false, getProperty<bool>(getParagraph(2), "ParaIsHyphenation"));
+}
+
 CPPUNIT_PLUGIN_IMPLEMENT();
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

sw/source/filter/ww8/rtfattributeoutput.cxx

@@ -2663,20 +2663,8 @@ void RtfAttributeOutput::ParaTabStop(const SvxTabStopItem& rTabStop)
 
 void RtfAttributeOutput::ParaHyphenZone(const SvxHyphenZoneItem& rHyphenZone)
 {
-    sal_Int32 nFlags = rHyphenZone.IsHyphen() ? 1 : 0;
-    if (rHyphenZone.IsPageEnd())
-        nFlags += 2;
-    m_aStyles.append('{');
-    m_aStyles.append(OOO_STRING_SVTOOLS_RTF_IGNORE);
-    m_aStyles.append(OOO_STRING_SVTOOLS_RTF_HYPHEN);
-    m_aStyles.append((sal_Int32)nFlags);
-    m_aStyles.append(OOO_STRING_SVTOOLS_RTF_HYPHLEAD);
-    m_aStyles.append((sal_Int32)rHyphenZone.GetMinLead());
-    m_aStyles.append(OOO_STRING_SVTOOLS_RTF_HYPHTRAIL);
-    m_aStyles.append((sal_Int32)rHyphenZone.GetMinTrail());
-    m_aStyles.append(OOO_STRING_SVTOOLS_RTF_HYPHMAX);
-    m_aStyles.append((sal_Int32)rHyphenZone.GetMaxHyphens());
-    m_aStyles.append('}');
+    m_aStyles.append(OOO_STRING_SVTOOLS_RTF_HYPHPAR);
+    m_aStyles.append(int(rHyphenZone.IsHyphen()));
 }
 
 void RtfAttributeOutput::ParaNumRule_Impl(const SwTxtNode* pTxtNd, sal_Int32 nLvl, sal_Int32 nNumId)