The push module won't compile on ZNC dev branch .203. This is for a number of reasons (moving of header files, new network options)
I have forked your project on github and fixed all of these issues so that it now works on dev branch .203. I don't think you'd want me to open a pull request on this and ZNC could change before the final release of .203. But I wanted to give you my code now so you knew it was there.