Make improvements

- Fix build flakes
- Polyfill SIGWINCH on Windows
- Fix an execve issue on Windows
- Make strerror show more information
- Improve cmd.exe setup/teardown on Windows
- Support bracketed paste mode in Blinkenlights
- Show keyboard shortcuts in Blinkenlights status bar
- Fixed copy_file_range() and copyfile() w/ zip filesystem
- Size optimize GetDosArgv() to keep life.com 12kb in size
- Improve Blinkenlights ability to load weird ELF executables
- Fix program_executable_name and add GetInterpreterExecutableName
- Make Python in tiny mode fail better if docstrings are requested
- Update Python test exclusions in tiny* modes such as tinylinux
- Add bulletproof unbreakable kprintf() troubleshooting function
- Remove "oldskool" keyword from ape.S for virus scanners
- Fix issue that caused backtraces to not print sometimes
- Improve Blinkenlights serial uart character i/o
- Make clock_gettime() not clobber errno on xnu
- Improve sha256 cpuid check for old computers
- Integrate some bestline linenoise fixes
- Show runit process names better in htop
- Remove SIGPIPE from ShowCrashReports()
- Make realpath() not clobber errno
- Avoid attaching GDB on non-Linux
- Improve img.com example

tool/build/lib/eztls.c

@@ -159,6 +159,25 @@ void EzHandshake(void) {
   }
 }
 
+int EzHandshake2(void) {
+  int rc;
+  while ((rc = mbedtls_ssl_handshake(&ezssl))) {
+    if (rc == MBEDTLS_ERR_NET_CONN_RESET) {
+      return rc;
+    } else if (rc != MBEDTLS_ERR_SSL_WANT_READ) {
+      TlsDie("handshake failed", rc);
+    }
+  }
+  while ((rc = EzTlsFlush(&ezbio, 0, 0))) {
+    if (rc == MBEDTLS_ERR_NET_CONN_RESET) {
+      return rc;
+    } else if (rc != MBEDTLS_ERR_SSL_WANT_READ) {
+      TlsDie("handshake flush failed", rc);
+    }
+  }
+  return 0;
+}
+
 void EzInitialize(void) {
   xsigaction(SIGPIPE, SIG_IGN, 0, 0, 0);
   ezconf.disable_compression = 1; /* TODO(jart): Why does it behave weirdly? */