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/calls/sync-nt.c

@@ -29,7 +29,7 @@
 /**
  * Flushes all open file handles and, if possible, all disk drives.
  */
-int sys_sync_nt(void) {
+textwindows int sys_sync_nt(void) {
   unsigned i;
   int64_t volume;
   uint32_t drives;