filled in some docs for the FTP server control commands

<servercmd>

Special-commands for the server.

For FTP, these are supported:

REPLY

COUNT

DELAY

REPLY [command] [return value] [response string]

 - Changes how the server responds to the [command]

COUNT [command] [num]

 - Do the REPLY change for [command] only [num] times and then go back to the

   built-in approach

DELAY [command] [secs]

 - Delay responding to this command for the given time

RETRWEIRDO

 - Enable the "weirdo" RETR case when multiple response lines appear at once

   when a file is transfered

RETRNOSIZE

 - Make sure the RETR response doesn't contain the size of the file

NOSAVE

 - Don't actually save what is received

SLOWDOWN

 - Send FTP responses with 0.1 sec delay between each byte

PASVBADIP  - makes PASV send back an illegal IP in its 227 response

 - Send back a bad IP in the PASV response

For HTTP:

auth_required - if this is set and a POST/PUT is made without auth, the