syslogd.sh test fails when ipv6 is disabled

[Bone Baboon]

I am using the Guix operating system which is a build from source
operating system.  When I build the Guix package for inetutils from
source it fails because the syslogd.sh test fails.  I am building the
Guix inetutils package using this Guix command to build packages: `guix
build --no-substitutes inetutils`.  This command does several build
steps including running the inetutils test suite.

I think the syslogd.sh test is failing because I have disabled ipv6 with
the Linux kernel argument `ipv6.disable=1`.

Disabling ipv6 stops an ipv6 leak which compromises the privacy provided
by the VPN service I am using.  I did the ipv6 leak testing with
https://ipv6leak.com which is a ipv6 leak testing site.  It is the first
result I received when searching for "ipv6 leak" with searx.ir.

Would it be possible to modify the inetutils test suite so that
syslogd.sh does not fail if ipv6 is disabled?

Guix build is running `make check` which can be seen in the output of
the Guix build log for inetutils as it includes: 'command "make"
"check" failed with status 2'.

inetutils test suite log contents:

```
===============================================
   GNU inetutils 1.9.4: tests/test-suite.log
===============================================

# TOTAL: 15
# PASS:  8
# SKIP:  6
# XFAIL: 0
# FAIL:  1
# XPASS: 0
# ERROR: 0

.. contents:: :depth: 2

SKIP: ping-localhost.sh
=======================

ping needs to run as root
SKIP ping-localhost.sh (exit status: 77)

SKIP: traceroute-localhost.sh
=============================

traceroute needs to run as root
SKIP traceroute-localhost.sh (exit status: 77)

SKIP: tftp.sh
=============

The use of the superserver Inetd in this script requires
the availability of "/etc/nsswitch.conf", "/etc/passwd", and
"/etc/protocols".  At least one of these is now missing.
Therefore skipping test.
SKIP tftp.sh (exit status: 77)

FAIL: syslogd.sh
================

../src/logger: ::1:7041: Cannot assign requested address
Registered 24 successes out of 25.
NOTICE: Standard port test was not run.
Failing some tests.
FAIL syslogd.sh (exit status: 1)

SKIP: ftp-localhost.sh
======================

The use of the superserver Inetd in this script requires
the availability of "/etc/nsswitch.conf", "/etc/passwd", and
"/etc/protocols".  At least one of these is now missing.
Therefore skipping test.
SKIP ftp-localhost.sh (exit status: 77)

SKIP: inetd.sh
==============

This test requires the availability of "/etc/protocols",
a file which can not be found in the current system.
Therefore skipping this test.
SKIP inetd.sh (exit status: 77)

SKIP: telnet-localhost.sh
=========================

No TTY assigned to this process.  Skipping test.
SKIP telnet-localhost.sh (exit status: 77)
```