Prevent duplicate signatures by using http_fingerprint() without args

modules/auxiliary/scanner/http/http_version.rb

@@ -32,12 +32,7 @@ class Metasploit3 < Msf::Auxiliary
   # Fingerprint a single host
   def run_host(ip)
     begin
-      connect
+      fp = http_fingerprint
-
-      res = send_request_raw({'uri' => '/', 'method' => 'GET' })
-      return if not res
-
-      fp = http_fingerprint(:response => res)
       print_status("#{ip}:#{rport} #{fp}") if fp
     rescue ::Timeout::Error, ::Errno::EPIPE
     end