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/Include/codecs.h

@@ -1,5 +1,6 @@
 #ifndef Py_CODECREGISTRY_H
 #define Py_CODECREGISTRY_H
+#include "third_party/python/Include/object.h"
 COSMOPOLITAN_C_START_
 /* clang-format off */
 
@@ -22,7 +23,7 @@ Copyright (c) Corporation for National Research Initiatives.
 
    The search_function's refcount is incremented by this function. */
 
-PyAPI_FUNC(int) PyCodec_Register(
+int PyCodec_Register(
        PyObject *search_function
        );
 
@@ -45,11 +46,11 @@ PyAPI_FUNC(int) PyCodec_Register(
  */
 
 #ifndef Py_LIMITED_API
-PyAPI_FUNC(PyObject *) _PyCodec_Lookup(
+PyObject * _PyCodec_Lookup(
        const char *encoding
        );
 
-PyAPI_FUNC(int) _PyCodec_Forget(
+int _PyCodec_Forget(
        const char *encoding
        );
 #endif
@@ -61,7 +62,7 @@ PyAPI_FUNC(int) _PyCodec_Forget(
 
 */
 
-PyAPI_FUNC(int) PyCodec_KnownEncoding(
+int PyCodec_KnownEncoding(
        const char *encoding
        );
 
@@ -75,7 +76,7 @@ PyAPI_FUNC(int) PyCodec_KnownEncoding(
 
  */
 
-PyAPI_FUNC(PyObject *) PyCodec_Encode(
+PyObject * PyCodec_Encode(
        PyObject *object,
        const char *encoding,
        const char *errors
@@ -91,7 +92,7 @@ PyAPI_FUNC(PyObject *) PyCodec_Encode(
 
  */
 
-PyAPI_FUNC(PyObject *) PyCodec_Decode(
+PyObject * PyCodec_Decode(
        PyObject *object,
        const char *encoding,
        const char *errors
@@ -111,18 +112,18 @@ PyAPI_FUNC(PyObject *) PyCodec_Decode(
    in Python 3.5+?
 
  */
-PyAPI_FUNC(PyObject *) _PyCodec_LookupTextEncoding(
+PyObject * _PyCodec_LookupTextEncoding(
        const char *encoding,
        const char *alternate_command
        );
 
-PyAPI_FUNC(PyObject *) _PyCodec_EncodeText(
+PyObject * _PyCodec_EncodeText(
        PyObject *object,
        const char *encoding,
        const char *errors
        );
 
-PyAPI_FUNC(PyObject *) _PyCodec_DecodeText(
+PyObject * _PyCodec_DecodeText(
        PyObject *object,
        const char *encoding,
        const char *errors
@@ -131,12 +132,12 @@ PyAPI_FUNC(PyObject *) _PyCodec_DecodeText(
 /* These two aren't actually text encoding specific, but _io.TextIOWrapper
  * is the only current API consumer.
  */
-PyAPI_FUNC(PyObject *) _PyCodecInfo_GetIncrementalDecoder(
+PyObject * _PyCodecInfo_GetIncrementalDecoder(
        PyObject *codec_info,
        const char *errors
        );
 
-PyAPI_FUNC(PyObject *) _PyCodecInfo_GetIncrementalEncoder(
+PyObject * _PyCodecInfo_GetIncrementalEncoder(
        PyObject *codec_info,
        const char *errors
        );
@@ -154,33 +155,33 @@ PyAPI_FUNC(PyObject *) _PyCodecInfo_GetIncrementalEncoder(
 
 /* Get an encoder function for the given encoding. */
 
-PyAPI_FUNC(PyObject *) PyCodec_Encoder(
+PyObject * PyCodec_Encoder(
        const char *encoding
        );
 
 /* Get a decoder function for the given encoding. */
 
-PyAPI_FUNC(PyObject *) PyCodec_Decoder(
+PyObject * PyCodec_Decoder(
        const char *encoding
        );
 
 /* Get an IncrementalEncoder object for the given encoding. */
 
-PyAPI_FUNC(PyObject *) PyCodec_IncrementalEncoder(
+PyObject * PyCodec_IncrementalEncoder(
        const char *encoding,
        const char *errors
        );
 
 /* Get an IncrementalDecoder object function for the given encoding. */
 
-PyAPI_FUNC(PyObject *) PyCodec_IncrementalDecoder(
+PyObject * PyCodec_IncrementalDecoder(
        const char *encoding,
        const char *errors
        );
 
 /* Get a StreamReader factory function for the given encoding. */
 
-PyAPI_FUNC(PyObject *) PyCodec_StreamReader(
+PyObject * PyCodec_StreamReader(
        const char *encoding,
        PyObject *stream,
        const char *errors
@@ -188,7 +189,7 @@ PyAPI_FUNC(PyObject *) PyCodec_StreamReader(
 
 /* Get a StreamWriter factory function for the given encoding. */
 
-PyAPI_FUNC(PyObject *) PyCodec_StreamWriter(
+PyObject * PyCodec_StreamWriter(
        const char *encoding,
        PyObject *stream,
        const char *errors
@@ -202,35 +203,35 @@ PyAPI_FUNC(PyObject *) PyCodec_StreamWriter(
    callback name, when name is specified as the error parameter
    in the call to the encode/decode function.
    Return 0 on success, -1 on error */
-PyAPI_FUNC(int) PyCodec_RegisterError(const char *name, PyObject *error);
+int PyCodec_RegisterError(const char *name, PyObject *error);
 
 /* Lookup the error handling callback function registered under the given
    name. As a special case NULL can be passed, in which case
    the error handling callback for "strict" will be returned. */
-PyAPI_FUNC(PyObject *) PyCodec_LookupError(const char *name);
+PyObject * PyCodec_LookupError(const char *name);
 
 /* raise exc as an exception */
-PyAPI_FUNC(PyObject *) PyCodec_StrictErrors(PyObject *exc);
+PyObject * PyCodec_StrictErrors(PyObject *exc);
 
 /* ignore the unicode error, skipping the faulty input */
-PyAPI_FUNC(PyObject *) PyCodec_IgnoreErrors(PyObject *exc);
+PyObject * PyCodec_IgnoreErrors(PyObject *exc);
 
 /* replace the unicode encode error with ? or U+FFFD */
-PyAPI_FUNC(PyObject *) PyCodec_ReplaceErrors(PyObject *exc);
+PyObject * PyCodec_ReplaceErrors(PyObject *exc);
 
 /* replace the unicode encode error with XML character references */
-PyAPI_FUNC(PyObject *) PyCodec_XMLCharRefReplaceErrors(PyObject *exc);
+PyObject * PyCodec_XMLCharRefReplaceErrors(PyObject *exc);
 
 /* replace the unicode encode error with backslash escapes (\x, \u and \U) */
-PyAPI_FUNC(PyObject *) PyCodec_BackslashReplaceErrors(PyObject *exc);
+PyObject * PyCodec_BackslashReplaceErrors(PyObject *exc);
 
 #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03050000
 /* replace the unicode encode error with backslash escapes (\N, \x, \u and \U) */
-PyAPI_FUNC(PyObject *) PyCodec_NameReplaceErrors(PyObject *exc);
+PyObject * PyCodec_NameReplaceErrors(PyObject *exc);
 #endif
 
 #ifndef Py_LIMITED_API
-PyAPI_DATA(const char *) Py_hexdigits;
+extern const char * Py_hexdigits;
 #endif
 
 COSMOPOLITAN_C_END_