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

libc/log/showcrashreports.c

@@ -59,7 +59,6 @@ void ShowCrashReports(void) {
   kCrashSigs[4] = SIGTRAP; /* bad system call */
   kCrashSigs[5] = SIGABRT; /* abort() called */
   kCrashSigs[6] = SIGBUS;  /* misaligned, noncanonical ptr, etc. */
-  kCrashSigs[7] = SIGPIPE; /* write to closed thing */
   /* </SYNC-LIST>: showcrashreports.c, oncrashthunks.S, oncrash.c */
   bzero(&sa, sizeof(sa));
   ss.ss_flags = 0;