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/python/Modules/_decimal/libmpdec/context.c

@@ -38,14 +38,14 @@ Copyright 2008-2016 Stefan Krah\"");
 asm(".include \"libc/disclaimer.inc\"");
 
 void
-mpd_dflt_traphandler(mpd_context_t *ctx UNUSED)
+mpd_dflt_traphandler(mpd_context_t *ctx)
 {
+    (void)ctx;
     raise(SIGFPE);
 }
 
 void (* mpd_traphandler)(mpd_context_t *) = mpd_dflt_traphandler;
 
-
 /* Set guaranteed minimum number of coefficient words. The function may
    be used once at program start. Setting MPD_MINALLOC to out-of-bounds
    values is a catastrophic error, so in that case the function exits rather
@@ -54,7 +54,6 @@ void
 mpd_setminalloc(mpd_ssize_t n)
 {
     static int minalloc_is_set = 0;
-
     if (minalloc_is_set) {
         mpd_err_warn("mpd_setminalloc: ignoring request to set "
                      "MPD_MINALLOC a second time\n");
@@ -71,18 +70,14 @@ void
 mpd_init(mpd_context_t *ctx, mpd_ssize_t prec)
 {
     mpd_ssize_t ideal_minalloc;
-
     mpd_defaultcontext(ctx);
-
     if (!mpd_qsetprec(ctx, prec)) {
         mpd_addstatus_raise(ctx, MPD_Invalid_context);
         return;
     }
-
     ideal_minalloc = 2 * ((prec+MPD_RDIGITS-1) / MPD_RDIGITS);
     if (ideal_minalloc < MPD_MINALLOC_MIN) ideal_minalloc = MPD_MINALLOC_MIN;
     if (ideal_minalloc > MPD_MINALLOC_MAX) ideal_minalloc = MPD_MINALLOC_MAX;
-
     mpd_setminalloc(ideal_minalloc);
 }
 
@@ -134,7 +129,6 @@ mpd_ieee_context(mpd_context_t *ctx, int bits)
     if (bits <= 0 || bits > MPD_IEEE_CONTEXT_MAX_BITS || bits % 32) {
         return -1;
     }
-
     ctx->prec = 9 * (bits/32) - 2;
     ctx->emax = 3 * ((mpd_ssize_t)1<<(bits/16+3));
     ctx->emin = 1 - ctx->emax;
@@ -144,7 +138,6 @@ mpd_ieee_context(mpd_context_t *ctx, int bits)
     ctx->newtrap=0;
     ctx->clamp=1;
     ctx->allcr=1;
-
     return 0;
 }
 
@@ -196,7 +189,6 @@ mpd_getcr(const mpd_context_t *ctx)
     return ctx->allcr;
 }
 
-
 int
 mpd_qsetprec(mpd_context_t *ctx, mpd_ssize_t prec)
 {
@@ -277,7 +269,6 @@ mpd_qsetcr(mpd_context_t *ctx, int c)
     return 1;
 }
 
-
 void
 mpd_addstatus_raise(mpd_context_t *ctx, uint32_t flags)
 {