blackened-ircserv is part of this distribution.
You can set whether you want to install it within the Makefile,
here's a little help in deciding:

Pros:
IRCII will run as two separate processes, with blackened-ircserv responding to server
PINGs.  This means you can stop IRCII (with ^Z) and not get disconnected 
from a server. It will buffer 4K of stuff before it blocks and PINGs
will be missed.  If, for some reason, the blackened-ircserv program cannot be
started, IRCII will connect directly to the server without it
(transparently to the user)

Cons:
It blocks beyond 4K of stuff.
While being smaller than IRCII, it still takes up disk space.
Since it runs as a separate process, it uses system resources while
running (although not much).

Note: If you add #define NON_BLOCKING to blackened-ircserv.c, then blackened-ircserv will
not block at all.  Rather, it will discard all info beyond the 4K.
This means it will never miss a PING.
It can, however, screw up certain things (such as NOTIFY) if some
of the return information is discarded.  Use this NON_BLOCKING at
your own discretion 

Operation of IRCII is identical either way.  Remember to do a 
"make installserv" to compile and install blackened-ircserv if you are using it.
