RE: speed up a logical replica setup

Dear Euler,

Thanks for updating the patch! I have not reviewed yet, but cfbot did not
accept your patch [1]. It seems that you missed updating the windows part
in 0003 patch:

```
#if !defined(WIN32)
-       sub_base_conninfo = psprintf("host=%s port=%u user=%s fallback_application_name=%s",
+       sub_base_conninfo = psprintf("host=%s port=%s user=%s fallback_application_name=%s",
                                                                 opt.socket_dir, opt.sub_port, opt.sub_username,
progname);
 #else                                                  /* WIN32 */
        sub_base_conninfo = psprintf("port=%u user=%s fallback_application_name=%s"
```

Since the change is quite trivial, I felt no need to update the versioning.
PSA the new set to keep the cfbot quiet. These could pass tests on my CI.

[1]:  https://cirrus-ci.com/build/5253379782344704

Best Regards,
Hayato Kuroda
FUJITSU LIMITED
https://www.fujitsu.com/global/