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/Modules/signalmodule.c

@@ -985,13 +985,13 @@ signal_sigwait(PyObject *module, PyObject *sigset)
 #if defined(HAVE_SIGWAITINFO) || defined(HAVE_SIGTIMEDWAIT)
 static int initialized;
 static PyStructSequence_Field struct_siginfo_fields[] = {
-    {"si_signo",        "signal number"},
-    {"si_code",         "signal code"},
-    {"si_errno",        "errno associated with this signal"},
-    {"si_pid",          "sending process ID"},
-    {"si_uid",          "real user ID of sending process"},
-    {"si_status",       "exit value or signal"},
-    {"si_band",         "band event for SIGPOLL"},
+    {"si_signo",        PyDoc_STR("signal number")},
+    {"si_code",         PyDoc_STR("signal code")},
+    {"si_errno",        PyDoc_STR("errno associated with this signal")},
+    {"si_pid",          PyDoc_STR("sending process ID")},
+    {"si_uid",          PyDoc_STR("real user ID of sending process")},
+    {"si_status",       PyDoc_STR("exit value or signal")},
+    {"si_band",         PyDoc_STR("band event for SIGPOLL")},
     {0}
 };
 
@@ -1564,3 +1564,8 @@ void *_PyOS_SigintEvent(void)
     return sigint_event;
 }
 #endif
+
+_Section(".rodata.pytab.1") const struct _inittab _PyImport_Inittab__signal = {
+    "_signal",
+    PyInit__signal,
+};