Fix #5224, altered option description

modules/exploits/unix/ftp/proftpd_modcopy_exec.rb

@@ -57,8 +57,8 @@ class Metasploit3 < Msf::Exploit::Remote
       [
         OptPort.new('RPORT', [true, 'HTTP port', 80]),
         OptPort.new('RPORT_FTP', [true, 'FTP port', 21]),
+        OptString.new('TMPPATH', [true, 'Absolute writable path', '/tmp']),
         OptString.new('SITEPATH', [true, 'Absolute writable website path', '/var/www']),
-        OptString.new('TMPPATH', [true, 'Absolute writable/executable path', '/tmp']),
         OptString.new('TARGETURI', [true, 'Base path to the website', '/'])
       ], self.class)
   end