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/sock/poll-nt.c

@@ -17,7 +17,9 @@
 │ PERFORMANCE OF THIS SOFTWARE.                                                │
 ╚─────────────────────────────────────────────────────────────────────────────*/
 #include "libc/bits/bits.h"
+#include "libc/bits/weaken.h"
 #include "libc/calls/internal.h"
+#include "libc/calls/struct/sigaction.h"
 #include "libc/macros.internal.h"
 #include "libc/nt/struct/pollfd.h"
 #include "libc/nt/winsock.h"
@@ -42,6 +44,9 @@ textwindows int sys_poll_nt(struct pollfd *fds, uint64_t nfds, uint64_t ms) {
   }
   for (;;) {
     if (cmpxchg(&__interrupted, true, false)) return eintr();
+    if (weaken(_check_sigwinch) && weaken(_check_sigwinch)(g_fds.p + 0)) {
+      return eintr();
+    }
     waitfor = MIN(1000, ms); /* for ctrl+c */
     if ((got = WSAPoll(ntfds, nfds, waitfor)) != -1) {
       if (!got && (ms -= waitfor) > 0) continue;