WIP: add a stub IRC daemon named `kike'

As it is going to share a great lot of functionality with ZyklonB, I have
decided to extract the common parts into `common.c' and make the two subprojects
include this file.

The Single Compile Unit concept has proven valuable (sub-second compile times,
dead code warnings, almost no need for function declarations, whole-program
optimizations), and the sources aren't that long so far anyway.

I am probably going to add CMake support later but so far it's not a priority.
This project is meant to be portable and freely relocatable (ie. no hardcoded
paths if I can avoid it).

README

@@ -10,6 +10,17 @@ While originally intended to be a simple C99 rewrite of the original bot, which
 was written in the GNU dialect of AWK, it fairly quickly became a playground
 where I added everything that seemed nice.
 
+kike
+----
+Also included is a simple IRC daemon that mostly follows the RFC's but is
+limited to single-server networks, due to the protocol being incredibly ugly
+and tricky to implement correctly.  Even so, it took me a ridiculous amount of
+time to write.  (But it was a valuable exercise and I can reuse the code.)
+
+Disclaimer
+----------
+I am not an antisemitist, I'm just being an offensive asshole with the naming.
+
 License
 -------
 `ZyklonB' is written by Přemysl Janouch <p.janouch@gmail.com>.