don't set -Wmissing-noreturn on Windows because libtool
change some printf format specifiers in tests that are unrecognized by MingW
network traffic debug output, including source address on recvmsg
add some debug output to simple-watch poll implementation
check for failure of catta_set_nonblock in simple-watch and iface-windows
make ioctl() work for setting values
remove simple-watch debug output
remove network traffic debug output