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/net/echoserver.c

@@ -147,7 +147,7 @@ void GetListeningAddressesFromCommandLine(int argc, char *argv[]) {
   int i;
   for (i = optind; i < argc; ++i) {
     struct Socket server;
-    memset(&server, 0, sizeof(server));
+    bzero(&server, sizeof(server));
     char scheme[4];
     unsigned char *ip4 = (unsigned char *)&server.addr.sin_addr.s_addr;
     uint16_t port;
@@ -196,7 +196,7 @@ void BeginListeningForIncomingTraffic(void) {
 void AcceptConnection(size_t i) {
   struct Socket *server = &g_sockets.p[i];
   struct Socket client;
-  memset(&client, 0, sizeof(client));
+  bzero(&client, sizeof(client));
   client.kind = kSocketClient;
   client.type = server->type;
   client.protocol = server->protocol;
@@ -211,7 +211,7 @@ bool ReceiveData(size_t i) {
   ssize_t got;
   struct Message msg;
   bool isudp = g_sockets.p[i].protocol == IPPROTO_UDP;
-  memset(&msg, 0, sizeof(msg));
+  bzero(&msg, sizeof(msg));
   msg.destsize = sizeof(msg.dest);
   msg.data.iov_len = PAGESIZE;
   msg.data.iov_base = xmalloc(msg.data.iov_len);
@@ -287,7 +287,7 @@ int main(int argc, char *argv[]) {
   GetListeningAddressesFromCommandLine(argc, argv);
   BeginListeningForIncomingTraffic();
   struct InterruptibleCall icall;
-  memset(&icall, 0, sizeof(icall));
+  bzero(&icall, sizeof(icall));
   interruptiblecall(&icall, (void *)EchoServer, 0, 0, 0, 0);
   fputc('\r', stderr);
   INFOF("%s", "shutting down...");