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

tool/build/lib/javadown.c

@@ -44,12 +44,12 @@ static void DeleteLastEmptyLine(char *p, size_t n) {
 
 static void AppendLine(struct Lines *lines) {
   lines->p = realloc(lines->p, ++lines->n * sizeof(*lines->p));
-  memset(lines->p + lines->n - 1, 0, sizeof(*lines->p));
+  bzero(lines->p + lines->n - 1, sizeof(*lines->p));
 }
 
 static void AppendTag(struct JavadownTags *tags) {
   tags->p = realloc(tags->p, ++tags->n * sizeof(*tags->p));
-  memset(tags->p + tags->n - 1, 0, sizeof(*tags->p));
+  bzero(tags->p + tags->n - 1, sizeof(*tags->p));
 }
 
 static unsigned GetSpacePrefixLen(const char *p, size_t n) {
@@ -247,7 +247,7 @@ struct Javadown *ParseJavadown(const char *data, size_t size) {
   char *p;
   struct Lines lines;
   struct Javadown *jd;
-  memset(&lines, 0, sizeof(lines));
+  bzero(&lines, sizeof(lines));
   jd = calloc(1, sizeof(struct Javadown));
   p = strndup(data, size);
   SplitLines(&lines, p);