Log Message:
bftpd: Update to 5.7

This file contains all major changes made during the development of bftpd.
The uppermost change is the newest one.

Jesse Smith <jessefrgsmith@yahoo.ca> -> 5.7
	- A malicious client could cause a buffer overflow with
	  a lot of EPSV commands sent in a row. We now close
	  the pasv socket before each new use to avoid accumulating
	  more than 1023.
	  Thanks to Shisong Qin for reporting this issue and suggesting
	  a fix.