Adjust websocket permissions in the same way as controlsocket permissions

[neuro42]

• This is not a support question, I have read about opensource and will send support questions to the IRC channel, GitHub Discussions or the mailing list.
• I have read and understood the 'out in the open' support policy
• I have read and understood the PowerDNS AI policy

• Program: Authoritative
• Issue type: Bug report

Short description

The control unix socket fixes its permissions when setgid is set. The webserver unix socket does not.

Environment

• Operating system: Debian 13
• Software version: 5.1.4
• Software source: self-compiled backport of the current Debian 14 package; no other changes

Steps to reproduce

1. setgid=pdns
   webserver=yes
   webserver-address=/run/pdns-config/pdns-config.apisocket

Expected behaviour

srw-rw---- 1 pdns pdns 0 Sep 1 04:21 pdns-config.apisocket
srw-rw---- 1 pdns pdns 0 Sep 1 04:21 pdns-config.controlsocket

Actual behaviour (with distro default umask 022)

srwxr-xr-x 1 pdns pdns 0 Sep 1 04:21 pdns-config.apisocket
srw-rw---- 1 pdns pdns 0 Sep 1 04:21 pdns-config.controlsocket

Other information

9oi88ii

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