See #4868, reverts r13103

git-svn-id: file:///home/svn/framework3/trunk@13158 4d416f70-5f16-0410-b530-b9f4589650da

lib/msf/core/exploit/ftp.rb

@@ -72,7 +72,7 @@ module Exploit::Remote::Ftp
 		end
 
 		# force datasocket to renegotiate
-		self.datasocket.close if self.datasocket != nil
+		self.datasocket.shutdown if self.datasocket != nil
 
 		res = send_cmd(['PASV'], true, nsock)
 		return nil if not res =~ /^227/
@@ -91,7 +91,7 @@ module Exploit::Remote::Ftp
 	# This method handles disconnecting our data channel
 	#
 	def data_disconnect
-		self.datasocket.close
+		self.datasocket.shutdown
 		self.datasocket = nil
 	end