Add epoll and do more release readiness changes

This change also pays off some of the remaining technical debt with
stdio, file descriptors, and memory managemnt polyfills.

libc/sock/connect-nt.c

@@ -21,6 +21,7 @@
 #include "libc/calls/internal.h"
 #include "libc/nt/winsock.h"
 #include "libc/sock/internal.h"
+#include "libc/sock/yoink.inc"
 #include "libc/sysv/errfuns.h"
 
 textwindows int connect$nt(struct Fd *fd, const void *addr, uint32_t addrsize) {