Obsolete link

[Ricky-Tigg]

Hello. Here, again, among the indicators revealing a poorly active project, along with the mention of an heavily outdated source of documentation, whichi is illustrated by the book The Exim SMTP mail server, by Philip Hazel, 1st April 2007, the link for Smail 3 not only illustrates an insecure protocol (HTTP), but also once opened –at our own risks, leads to a page where no mention of Smail 3 is present neither Smail 3 is covered in the web site it is redirected to nor elsewhere on internet.

[HeikoSchlittermann]

The project is active, see https://git.exim.org/, but yes, the website and its links are a bit unmaintained currently. Thanks for bringing this to our attention again.

[HeikoSchlittermann]

This closes #5 too