Make improvements

- Expand redbean UNIX module
- Expand redbean documentation
- Ensure Lua copyright is embedded in binary
- Increase the PATH_MAX limit especially on NT
- Use column major sorting for linenoise completions
- Fix some suboptimalities in redbean's new UNIX API
- Figured out right flags for Multics newline in raw mode

libc/calls/ioctl_tcsets.c

@@ -83,11 +83,6 @@ int ioctl_tcsets(int fd, uint64_t request, ...) {
   } else {
     rc = einval();
   }
-  if (rc != -1) {
-    if (__nomultics == 0 || __nomultics == 1) {
-      __nomultics = !(tio->c_oflag & OPOST);
-    }
-  }
   STRACE("ioctl_tcsets(%d, %p, %p) → %d% m", fd, request, tio, rc);
   return rc;
 }