Import tnftp-20121224.

* Add https support.
* When using the response to SYST to decide whether to default to
  'binary' be a lot less specific.

Obtained-from:   NetBSD
de: Reset chip after calling ether_ifattach()

Else the ifnet is not completely initialized

Reported-by: swildner@
Merge branch 'vendor/TNFTP'
ftp: Update files for tnftp-20121224 import.