Added 'general' section + added 'vospace_base_url' parameter.

Signed-off-by: Cristiano Urban <cristiano.urban@inaf.it>

transfer_service/config/vos_ts.conf.sample

@@ -46,6 +46,10 @@ pkey_file_path = /root/.ssh/tape_rsa
 # VOSpace backend settings #
 ############################
 
+[general]
+; VOSpace base URL
+vospace_base_url = <vospace_ui_base_url>
+
 [authentication]
 ; RAP client
 rap_client = <rap_client>