tftpd: Update to version 5.2

tftpd: Update to version 5.2

- Update from 0.48 (2007) to 5.2 (2011)
   Version 5.2 is the last update made to this program
- Update to rootfile
- Changelog
   Changes in 5.2:
	Fix breakage on newer Linux when a single interface has
         multiple IP addresses.
   Changes in 5.1:
	Add -P option to write a PID file.  Patch by Ferenc Wagner.
	Bounce the syslog socket in standalone mode, in case the
         syslog daemon has been restarted.  Patch by Ferenc Wagner.
	Build fixes.
	Fix handling of block number wraparound after a successful
         options negotiation.
	Fix a buffer overflow in option parsing.
   Changes in 5.0:
	Try to on platforms with getaddrinfo() without AI_ADDRCONFIG or
         AI_CANONNAME.
	Implement the "rollover" option, for clients which want block
         number to rollover to anything other than zero.
	Correctly disable PMTU in standalone mode.  Patch by Florian
         Lohoff.
   Changes in 0.49:
	Add IPv6 support.  Patch by Karsten Keil.
	Support systems with editline instead of readline.
	Support long options in the server.

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>