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/calls/struct/sigaction.h

@@ -24,6 +24,7 @@ COSMOPOLITAN_C_START_
 
 void _init_onntconsoleevent(void);
 void _init_wincrash(void);
+bool _check_sigwinch();
 
 #ifndef __SIGACTION_YOINK
 #define __SIGACTION_YOINK(SIG)             \
@@ -44,12 +45,16 @@ void _init_wincrash(void);
           case SIGFPE:                     \
             YOINK(_init_wincrash);         \
             break;                         \
+          case SIGWINCH:                   \
+            YOINK(_check_sigwinch);        \
+            break;                         \
           default:                         \
             break;                         \
         }                                  \
       } else {                             \
         YOINK(_init_onntconsoleevent);     \
         YOINK(_init_wincrash);             \
+        YOINK(_check_sigwinch);            \
       }                                    \
     }                                      \
   } while (0)