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

libc/runtime/mmap.c

@@ -23,6 +23,7 @@
 #include "libc/calls/sysdebug.internal.h"
 #include "libc/dce.h"
 #include "libc/intrin/asan.internal.h"
+#include "libc/log/backtrace.internal.h"
 #include "libc/macros.internal.h"
 #include "libc/rand/rand.h"
 #include "libc/runtime/directmap.internal.h"
@@ -61,6 +62,8 @@
 void *mmap(void *addr, size_t size, int prot, int flags, int fd, int64_t off) {
   struct DirectMap dm;
   int i, x, n, m, a, b, f;
+  SYSDEBUG("mmap(0x%x, 0x%x, %d, 0x%x, %d, %d)", addr, size, prot, flags, fd,
+           off);
   if (!size) return VIP(einval());
   if (size > 0x0000010000000000ull) return VIP(enomem());
   if (!ALIGNED(off)) return VIP(einval());
@@ -98,6 +101,7 @@ void *mmap(void *addr, size_t size, int prot, int flags, int fd, int64_t off) {
   }
   dm = sys_mmap(addr, size, prot, f, fd, off);
   if (dm.addr == MAP_FAILED || dm.addr != addr) {
+    SYSDEBUG("sys_mmap failed");
     return MAP_FAILED;
   }
   a = ROUNDDOWN((intptr_t)addr, FRAMESIZE) >> 16;