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/mbedtls/test/test_suite_aes.cfb.c

@@ -200,7 +200,7 @@ void test_aes_encrypt_xts( char *hex_key_string, char *hex_data_unit_string,
     TEST_ASSERT( mbedtls_aes_crypt_xts( &ctx, MBEDTLS_AES_ENCRYPT, src_len,
                                         data_unit, src, output ) == 0 );
 
-    TEST_ASSERT( memcmp( output, dst, dst_len ) == 0 );
+    TEST_ASSERT( timingsafe_bcmp( output, dst, dst_len ) == 0 );
 
 exit:
     mbedtls_aes_xts_free( &ctx );
@@ -249,7 +249,7 @@ void test_aes_decrypt_xts( char *hex_key_string, char *hex_data_unit_string,
     TEST_ASSERT( mbedtls_aes_crypt_xts( &ctx, MBEDTLS_AES_DECRYPT, src_len,
                                         data_unit, src, output ) == 0 );
 
-    TEST_ASSERT( memcmp( output, dst, dst_len ) == 0 );
+    TEST_ASSERT( timingsafe_bcmp( output, dst, dst_len ) == 0 );
 
 exit:
     mbedtls_aes_xts_free( &ctx );
@@ -463,7 +463,7 @@ void test_aes_encrypt_ofb( int fragment_size, data_t *key_str,
         TEST_ASSERT( mbedtls_aes_crypt_ofb( &ctx, fragment_size, &iv_offset,
                                             iv_str->x, src_str_next, output ) == 0 );
 
-        TEST_ASSERT( memcmp( output, expected_output->x, fragment_size ) == 0 );
+        TEST_ASSERT( timingsafe_bcmp( output, expected_output->x, fragment_size ) == 0 );
 
         in_buffer_len -= fragment_size;
         expected_output->x += fragment_size;