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/dns/lookupservicesbyport.c

@@ -59,7 +59,7 @@ int LookupServicesByPort(const int servport, char *servproto,
                          const char *filepath) {
   FILE *f;
   char *line;
-  char pathbuf[PATH_MAX + 1];
+  char pathbuf[PATH_MAX];
   const char *path;
   size_t linesize;
   int found;