Fix bugs with recent change

This change makes further effort towards improving our poll()
implementation on the New Technology. The stdin worker didn't work out
so well for Python so it's not being used for now. System call tracing
with the --strace flag should now be less noisy now on Windows unless
you modify the strace.internal.h defines to turn on some optional ones
that are most useful for debugging the system call wrappers.

libc/sock/select.c

@@ -22,8 +22,11 @@
 #include "libc/sock/select.h"
 
 /**
- * Does what poll() does except with a complicated bitset API.
- * @note windows nt is limited to first 64 socket descriptors
+ * Does what poll() does except with bitset API.
+ *
+ * This system call is supported on all platforms. However, on Windows,
+ * this is polyfilled to translate into poll(). So it's recommended that
+ * poll() be used instead.
  */
 int select(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds,
            struct timeval *timeout) {