[configuration] save xml list element

[Tobias.Wolf]

I`m reading a xml configuration object with a xml element containing a comma 
separated string:

<SSLEnabledProtocols>TLSv1.1,TLSv1.2</SSLEnabledProtocols>

I archive this by setting explicitly a ListDelimiterHandler

this.xmlConfigBuilder = new 
FileBasedConfigurationBuilder<XMLConfiguration>(ExtendedXMLConfiguration.class)
                                        
.configure(params.xml().setFile(configFile).setExpressionEngine(new 
XPathExpressionEngine())
                                                        
.setListDelimiterHandler(new DefaultListDelimiterHandler(',')));


and the reading is fine, but when I write this out I got separate xml elements 
for each value instead of the same comma separated value element.

this.xmlConfigBuilder.save();

<SSLEnabledProtocols>TLSv1.1</SSLEnabledProtocols>
<SSLEnabledProtocols>TLSv1.2</SSLEnabledProtocols>