checksum.c) and then move the resutlting checksum.c into libs/utils
ditching nq's. Due to net_com.c, qw's libqfnet.a will need to be deleted or
you will get duplicate symbol link errors. Also merge crc.[ch] and move
qfplits.[ch] to their final homes. Also, remove a slightly overzealous use
of "static" in qfplist.[ch].