URL for home page and privacy policy point to a dead site

[Kevin Cole]

This is for alpine 2.25+dfsg1-1build1

```
$ apt-cache show alpine
...
Homepage: http://alpine.x10host.com/alpine/
```

That website does not exist any longer.

Upon first run, there is a message about the privacy policy which lists the URL http://alpine.x10host.com/privacy.html which, because the website is gone, is also busted.

The new home -- which has the privacy policy on the home page -- is https://alpineapp.email/

A person I'm helping attempted to reach the privacy policy URL via `lynx` and ended up at some bogus xyz domain that looked rather suspicious. Hence, a bit of security concern... I'll try to contact the official upstream maintainer, Eduardo Chappa, regarding that privacy policy text.