Realy ???
Try to use clear installation of CoD2 on minimal distribution on Debian, after that try libcod with multilib and mysql, you can see difference's abouth ping.
I don't have any issues and other problem's with libcod, but my answer is: what is goals to use libcod?? Why we use libcod ???
I'm moder's and scripter's for cod2 abowe 2008, I try to find differences between classic scripts and libcod, and I don't find that.
I only find issue with CPU lopad and memory use. Libcod much more use CPU load and memory. What is difference?? Why to use libcod ???
Tell me any reason, and I will use libcod on my servers.