Example per-batch vprint, a useful default

Author: jhart-r7

modules/auxiliary/scanner/udp_scanner_template.rb

@@ -54,6 +54,7 @@ def scanner_process(data, src_host, src_port)
 
   # Called before the scan block
   def scanner_prescan(batch)
+    vprint_status("Sending probes to #{batch[0]}->#{batch[-1]} (#{batch.length} hosts)")
     @results = {}
     @probe = "abracadabra!"
   end