Make numerous improvements

- Python static hello world now 1.8mb
- Python static fully loaded now 10mb
- Python HTTPS client now uses MbedTLS
- Python REPL now completes import stmts
- Increase stack size for Python for now
- Begin synthesizing posixpath and ntpath
- Restore Python \N{UNICODE NAME} support
- Restore Python NFKD symbol normalization
- Add optimized code path for Intel SHA-NI
- Get more Python unit tests passing faster
- Get Python help() pagination working on NT
- Python hashlib now supports MbedTLS PBKDF2
- Make memcpy/memmove/memcmp/bcmp/etc. faster
- Add Mersenne Twister and Vigna to LIBC_RAND
- Provide privileged __printf() for error code
- Fix zipos opendir() so that it reports ENOTDIR
- Add basic chmod() implementation for Windows NT
- Add Cosmo's best functions to Python cosmo module
- Pin function trace indent depth to that of caller
- Show memory diagram on invalid access in MODE=dbg
- Differentiate stack overflow on crash in MODE=dbg
- Add stb_truetype and tools for analyzing font files
- Upgrade to UNICODE 13 and reduce its binary footprint
- COMPILE.COM now logs resource usage of build commands
- Start implementing basic poll() support on bare metal
- Set getauxval(AT_EXECFN) to GetModuleFileName() on NT
- Add descriptions to strerror() in non-TINY build modes
- Add COUNTBRANCH() macro to help with micro-optimizations
- Make error / backtrace / asan / memory code more unbreakable
- Add fast perfect C implementation of μ-Law and a-Law audio codecs
- Make strtol() functions consistent with other libc implementations
- Improve Linenoise implementation (see also github.com/jart/bestline)
- COMPILE.COM now suppresses stdout/stderr of successful build commands

third_party/python/Include/pyerrors.h

@@ -101,7 +101,7 @@ void PyErr_SetExcInfo(PyObject *, PyObject *, PyObject *);
 #endif
 
 /* Defined in Python/pylifecycle.c */
-void Py_FatalError(const char *message) _Py_NO_RETURN;
+void Py_FatalError(const char *message) relegated _Py_NO_RETURN;
 
 #if defined(Py_DEBUG) || defined(Py_LIMITED_API)
 #define _PyErr_OCCURRED() PyErr_Occurred()
@@ -247,7 +247,7 @@ PyObject * PyErr_SetFromErrnoWithFilename(
     PyObject *exc,
     const char *filename   /* decoded from the filesystem encoding */
     );
-#if defined(MS_WINDOWS) && !defined(Py_LIMITED_API)
+#if !defined(Py_LIMITED_API)
 PyObject * PyErr_SetFromErrnoWithUnicodeFilename(
     PyObject *, const Py_UNICODE *);
 #endif /* MS_WINDOWS */
@@ -349,7 +349,6 @@ PyObject * _PyErr_TrySetFromCause(
     );
 #endif
 
-
 /* In sigcheck.c or signalmodule.c */
 int PyErr_CheckSignals(void);
 void PyErr_SetInterrupt(void);
@@ -477,20 +476,6 @@ int PyUnicodeTranslateError_SetReason(
     const char *reason          /* UTF-8 encoded string */
     );
 
-/* These APIs aren't really part of the error implementation, but
-   often needed to format error messages; the native C lib APIs are
-   not available on all platforms, which is why we provide emulations
-   for those platforms in Python/mysnprintf.c,
-   WARNING:  The return value of snprintf varies across platforms; do
-   not rely on any particular behavior; eventually the C99 defn may
-   be reliable.
-*/
-#if defined(MS_WIN32) && !defined(HAVE_SNPRINTF)
-# define HAVE_SNPRINTF
-# define snprintf _snprintf
-# define vsnprintf _vsnprintf
-#endif
-
 int PyOS_snprintf(char *str, size_t size, const char  *format, ...)
                         Py_GCC_ATTRIBUTE((format(printf, 3, 4)));
 int PyOS_vsnprintf(char *str, size_t size, const char  *format, va_list va)