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

net/https/generatecertificateserial.c

@@ -16,15 +16,11 @@
 │ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
+#include "libc/rand/rand.h"
 #include "net/https/https.h"
 #include "third_party/mbedtls/bignum.h"
-#include "third_party/mbedtls/ctr_drbg.h"
 
-void GenerateCertificateSerial(mbedtls_x509write_cert *wcert,
-                               mbedtls_ctr_drbg_context *kr) {
-  mbedtls_mpi x;
-  mbedtls_mpi_init(&x);
-  mbedtls_mpi_fill_random(&x, 128 / 8, mbedtls_ctr_drbg_random, kr);
-  mbedtls_x509write_crt_set_serial(wcert, &x);
-  mbedtls_mpi_free(&x);
+void GenerateCertificateSerial(mbedtls_x509write_cert *wcert) {
+  mbedtls_x509write_crt_set_serial(
+      wcert, &(mbedtls_mpi){1, 2, (uint64_t[]){rdrand(), rdrand()}});
 }