Client
------
*

Server
------

* Use mmap instead of read/write. This way, we'll benefit from zero copy
  networking in 2.4.x

Both
----
* Support IPv6

* Add netascii and octet transfer support.
/*
 * fill the input buffer, doing ascii conversions if requested
 * conversions are  lf -> cr,lf  and cr -> cr, nul
 */
/*
 * Output a buffer to a file, converting from netascii if requested.
 * CR,NUL -> CR  and CR,LF => LF.
 * Note spec is undefined if we get CR as last byte of file or a
 * CR followed by anything else.  In this case we leave it alone.
 */

* Decide what to do when we got memory allocation failure (other than exit)

Generic
-------
