You want to just rip out the notice I assume. Here is it's location, you may have to search a bit for it if it's not Ultimate3.a27.
File : ircd.c
You need to DELETE lines with the following in them and ONLY the following.
Line 1156, 1157, 1158 and 1159.
Those contain the code to use the 'Looking up your hostname...' values, delete those and recompile, it should then not display the notice. Alternatively, you could just undefine SHOW_HEADERS in config.h.
To do this, go into include, open up config.h and change the following :
Save, go back to main directory and recompile.
Am sure there is a setting in the networks' file for this but it eludes me at the moment.