Undiamond Python headers

This change gets the Python codebase into a state where it conforms to
the conventions of this codebase. It's now possible to include headers
from Python, without worrying about ordering. Python has traditionally
solved that problem by "diamonding" everything in Python.h, but that's
problematic since it means any change to any Python header invalidates
all the build artifacts. Lastly it makes tooling not work. Since it is
hard to explain to Emacs when I press C-c C-h to add an import line it
shouldn't add the header that actually defines the symbol, and instead
do follow the nonstandard Python convention.

Progress has been made on letting Python load source code from the zip
executable structure via the standard C library APIs. System calss now
recognizes zip!FILENAME alternative URIs as equivalent to zip:FILENAME
since Python uses colon as its delimiter.

Some progress has been made on embedding the notice license terms into
the Python object code. This is easier said than done since Python has
an extremely complicated ownership story.

- Some termios APIs have been added
- Implement rewinddir() dirstream API
- GetCpuCount() API added to Cosmopolitan Libc
- More bugs in Cosmopolitan Libc have been fixed
- zipobj.com now has flags for mangling the path
- Fixed bug a priori with sendfile() on certain BSDs
- Polyfill F_DUPFD and F_DUPFD_CLOEXEC across platforms
- FIOCLEX / FIONCLEX now polyfilled for fast O_CLOEXEC changes
- APE now supports a hybrid solution to no-self-modify for builds
- Many BSD-only magnums added, e.g. O_SEARCH, O_SHLOCK, SF_NODISKIO

third_party/python/Modules/_ssl.c

@@ -1,4 +1,6 @@
+#define PY_SSIZE_T_CLEAN
 /* clang-format off */
+
 /* SSL socket module
 
    SSL support based on patches by Brian E Gallew and Laszlo Kovacs.
@@ -15,14 +17,8 @@
        http://bugs.python.org/issue8108#msg102867 ?
 */
 
-#define PY_SSIZE_T_CLEAN
-
-#include "third_party/python/Include/Python.h"
-
 #ifdef WITH_THREAD
 #include "third_party/python/Include/pythread.h"
-
-
 #define PySSL_BEGIN_ALLOW_THREADS_S(save) \
     do { if (_ssl_locks_count>0) { (save) = PyEval_SaveThread(); } } while (0)
 #define PySSL_END_ALLOW_THREADS_S(save) \
@@ -33,16 +29,13 @@
 #define PySSL_BLOCK_THREADS     PySSL_END_ALLOW_THREADS_S(_save);
 #define PySSL_UNBLOCK_THREADS   PySSL_BEGIN_ALLOW_THREADS_S(_save);
 #define PySSL_END_ALLOW_THREADS PySSL_END_ALLOW_THREADS_S(_save); }
-
 #else   /* no WITH_THREAD */
-
 #define PySSL_BEGIN_ALLOW_THREADS_S(save)
 #define PySSL_END_ALLOW_THREADS_S(save)
 #define PySSL_BEGIN_ALLOW_THREADS
 #define PySSL_BLOCK_THREADS
 #define PySSL_UNBLOCK_THREADS
 #define PySSL_END_ALLOW_THREADS
-
 #endif
 
 /* Include symbols from _socket module */
@@ -50,17 +43,6 @@
 
 static PySocketModule_APIObject PySocketModule;
 
-#if defined(HAVE_POLL_H)
-#include <poll.h>
-#elif defined(HAVE_SYS_POLL_H)
-#include <sys/poll.h>
-#endif
-
-#ifndef MS_WINDOWS
-/* inet_pton */
-#include <arpa/inet.h>
-#endif
-
 /* Don't warn about deprecated functions */
 #ifdef __GNUC__
 #pragma GCC diagnostic ignored "-Wdeprecated-declarations"