remove WANT_DYNAMIC (it caused annoying binutils warnings)
  add eventfd, inotify_init1, epoll_init1, accept4, recvmmsg, sendmmsg
  add dup3, fanotify_init, fanotify_mark, signalfd4, timerfd_settime
  add timerfd_gettime
forget two
also include fcntl.h in sys/epoll.h
narf
gcc is too picky
add constant for faccessat
make *intmax_t 64-bit on 64-bit (the infrastructure to support 128-bit
integers is not actually there)
fix reallocarray to manually use uint128_t