* origin/danga-bundle:
DS: epoll: fix misordered EPOLL_CTL_DEL call
DS: drop unused "_undef" sub
syscall: drop readahead wrapper
build: do not manify DS and Syscall pods
DS: handle EINTR in IO::Poll path, too
DS: workaround IO::Kqueue EINTR (mis-)handling
DS: drop profiling support
DS: remove unused fields and functions
listener: use EPOLLEXCLUSIVE for listen sockets
bundle Danga::Socket and Sys::Syscall