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/fileutils.h

@@ -1,31 +1,33 @@
 #ifndef Py_FILEUTILS_H
 #define Py_FILEUTILS_H
+#include "libc/calls/struct/stat.h"
+#include "third_party/python/Include/object.h"
 COSMOPOLITAN_C_START_
 /* clang-format off */
 
 #if !defined(Py_LIMITED_API) || Py_LIMITED_API+0 >= 0x03050000
-PyAPI_FUNC(wchar_t *) Py_DecodeLocale(
+wchar_t * Py_DecodeLocale(
     const char *arg,
     size_t *size);
 
-PyAPI_FUNC(char*) Py_EncodeLocale(
+char* Py_EncodeLocale(
     const wchar_t *text,
     size_t *error_pos);
 #endif
 
 #ifndef Py_LIMITED_API
 
-PyAPI_FUNC(wchar_t *) _Py_DecodeLocaleEx(
+wchar_t * _Py_DecodeLocaleEx(
     const char *arg,
     size_t *size,
     int current_locale);
 
-PyAPI_FUNC(char*) _Py_EncodeLocaleEx(
+char* _Py_EncodeLocaleEx(
     const wchar_t *text,
     size_t *error_pos,
     int current_locale);
 
-PyAPI_FUNC(PyObject *) _Py_device_encoding(int);
+PyObject * _Py_device_encoding(int);
 
 #if defined(MS_WINDOWS) || defined(__APPLE__)
     /* On Windows, the count parameter of read() is an int (bpo-9015, bpo-9611).
@@ -62,88 +64,88 @@ struct _Py_stat_struct {
 #  define _Py_stat_struct stat
 #endif
 
-PyAPI_FUNC(int) _Py_fstat(
+int _Py_fstat(
     int fd,
     struct _Py_stat_struct *status);
 
-PyAPI_FUNC(int) _Py_fstat_noraise(
+int _Py_fstat_noraise(
     int fd,
     struct _Py_stat_struct *status);
 
-PyAPI_FUNC(int) _Py_stat(
+int _Py_stat(
     PyObject *path,
     struct stat *status);
 
-PyAPI_FUNC(int) _Py_open(
+int _Py_open(
     const char *pathname,
     int flags);
 
-PyAPI_FUNC(int) _Py_open_noraise(
+int _Py_open_noraise(
     const char *pathname,
     int flags);
 
-PyAPI_FUNC(FILE *) _Py_wfopen(
+FILE * _Py_wfopen(
     const wchar_t *path,
     const wchar_t *mode);
 
-PyAPI_FUNC(FILE*) _Py_fopen(
+FILE* _Py_fopen(
     const char *pathname,
     const char *mode);
 
-PyAPI_FUNC(FILE*) _Py_fopen_obj(
+FILE* _Py_fopen_obj(
     PyObject *path,
     const char *mode);
 
-PyAPI_FUNC(Py_ssize_t) _Py_read(
+Py_ssize_t _Py_read(
     int fd,
     void *buf,
     size_t count);
 
-PyAPI_FUNC(Py_ssize_t) _Py_write(
+Py_ssize_t _Py_write(
     int fd,
     const void *buf,
     size_t count);
 
-PyAPI_FUNC(Py_ssize_t) _Py_write_noraise(
+Py_ssize_t _Py_write_noraise(
     int fd,
     const void *buf,
     size_t count);
 
 #ifdef HAVE_READLINK
-PyAPI_FUNC(int) _Py_wreadlink(
+int _Py_wreadlink(
     const wchar_t *path,
     wchar_t *buf,
     size_t bufsiz);
 #endif
 
 #ifdef HAVE_REALPATH
-PyAPI_FUNC(wchar_t*) _Py_wrealpath(
+wchar_t* _Py_wrealpath(
     const wchar_t *path,
     wchar_t *resolved_path,
     size_t resolved_path_size);
 #endif
 
-PyAPI_FUNC(wchar_t*) _Py_wgetcwd(
+wchar_t* _Py_wgetcwd(
     wchar_t *buf,
     size_t size);
 
-PyAPI_FUNC(int) _Py_get_inheritable(int fd);
+int _Py_get_inheritable(int fd);
 
-PyAPI_FUNC(int) _Py_set_inheritable(int fd, int inheritable,
+int _Py_set_inheritable(int fd, int inheritable,
                                     int *atomic_flag_works);
 
-PyAPI_FUNC(int) _Py_set_inheritable_async_safe(int fd, int inheritable,
+int _Py_set_inheritable_async_safe(int fd, int inheritable,
                                                int *atomic_flag_works);
 
-PyAPI_FUNC(int) _Py_dup(int fd);
+int _Py_dup(int fd);
 
 #ifndef MS_WINDOWS
-PyAPI_FUNC(int) _Py_get_blocking(int fd);
+int _Py_get_blocking(int fd);
 
-PyAPI_FUNC(int) _Py_set_blocking(int fd, int blocking);
+int _Py_set_blocking(int fd, int blocking);
 #endif   /* !MS_WINDOWS */
 
-PyAPI_FUNC(int) _Py_GetLocaleconvNumeric(
+int _Py_GetLocaleconvNumeric(
     PyObject **decimal_point,
     PyObject **thousands_sep,
     const char **grouping);