Yesod Web application stopped working (with FastCGI + Lighttpd) with LTS 12.26 => 19.25 transition

[Filip Graliński]

Hello,

My web application (https://gitlab.com/filipg/gonito) stopped working after the LTS 12.26 => 19.25 transition. To be precise, it works OK with `stack exec yesod devel` but not as a Fast CGI application with Lighttpd.

The message I can see in the Lighttpd logs is:

```

gonito lighttpd-angel[1357519]: gonito: Network.Socket.getAddrInfo (called with preferred socket type/protocol: Nothing, host name: Just "", service name: Nothing): does not exist (Name or service not known)

```

I did some changes in the parts generated by the scaffolding (https://gitlab.com/filipg/gonito/-/commit/ddc19b5721276c702bc48b40d193ab2899339c45), still to no avail.

Any idea what the problem is?

Filip Graliński