Make improvements

- Add rusage to redbean Lua API
- Add more redbean documentation
- Add pledge() to redbean Lua API
- Polyfill OpenBSD pledge() for Linux
- Increase PATH_MAX limit to 1024 characters
- Untrack sibling processes after fork() on Windows

libc/fmt/fmt.c

@@ -351,7 +351,7 @@ hidden int __fmt(void *fn, void *arg, const char *format, va_list va) {
         // undocumented %r specifier
         // used for good carriage return
         // helps integrate loggers with repls
-        if (!__replmode) {
+        if (!__replstderr) {
           break;
         } else {
           p = "\r\e[K";