Use Windows' certificate store by default instead of Java's truststore

src/net/java/sip/communicator/impl/certificate/CertificateServiceImpl.java

@@ -173,8 +173,16 @@ private void setTrustStore()
         String tsType = (String)config.getProperty(PNAME_TRUSTSTORE_TYPE);
         String tsFile = (String)config.getProperty(PNAME_TRUSTSTORE_FILE);
         String tsPassword = credService.loadPassword(PNAME_TRUSTSTORE_PASSWORD);
+
+        // use the OS store as default store on Windows
+        if (tsType == null
+            && !"meta:default".equals(tsType)
+            && OSUtils.IS_WINDOWS)
+        {
+            config.setProperty(PNAME_TRUSTSTORE_TYPE, "Windows-ROOT");
+        }
 
-        if(tsType != null)
+        if(tsType != null && !"meta:default".equals(tsType))
             System.setProperty("javax.net.ssl.trustStoreType", tsType);
         else
             System.getProperties().remove("javax.net.ssl.trustStoreType");

src/net/java/sip/communicator/plugin/certconfig/CertConfigPanel.java

@@ -199,8 +199,9 @@ public void actionPerformed(ActionEvent e)
         }
         if (e.getSource() == rdoUseJava)
         {
-            CertConfigActivator.getConfigService().removeProperty(
-                CertificateService.PNAME_TRUSTSTORE_TYPE);
+            CertConfigActivator.getConfigService().setProperty(
+                CertificateService.PNAME_TRUSTSTORE_TYPE,
+                "meta:default");
             CertConfigActivator.getConfigService().removeProperty(
                 CertificateService.PNAME_TRUSTSTORE_FILE);
             CertConfigActivator.getCredService().removePassword(