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/regex/tre-mem.c

@@ -77,7 +77,7 @@ tre_mem_t tre_mem_new_impl(int provided, void *provided_block) {
   tre_mem_t mem;
   if (provided) {
     mem = provided_block;
-    memset(mem, 0, sizeof(*mem));
+    bzero(mem, sizeof(*mem));
   } else
     mem = calloc(1, sizeof(*mem));
   if (mem == NULL) return NULL;
@@ -146,6 +146,6 @@ void *tre_mem_alloc_impl(tre_mem_t mem, int provided, void *provided_block,
   mem->ptr += size;
   mem->n -= size;
   /* Set to zero if needed. */
-  if (zero) memset(ptr, 0, size);
+  if (zero) bzero(ptr, size);
   return ptr;
 }