add EINTR for recv
add nonblock for nfqueue
add EINTR for nfqueue and netlink socket
add check for nfqueue when run ./configure.
format code
Merge branch 'master' of http://github.com/soarpenguin/tcpcopy
fix problems for configure.ac
fix the problem found by flowly
add kernel version detect for enable ip_queue or nfqueue.
fix problems for configure.ac
merge master