[DRE-maint] Bug#888649: apt-listbugs: Fails on ipv6

[Marius Mikucionis]

Package: ruby-httpclient
Version: 2.8.3-2
Followup-For: Bug #888649

While we wait for IPv6 adoption, here is a workaround for anyone interested:
configure getaddrinfo(3) to give precedence to IPv4-mapped addresses for sites that prefer IPv4 and then apt-listbugs (and many other stuff) just works.

In particular uncomment the following line in /etc/gai.conf:

precedence ::ffff:0:0/96  100

Best regards,
Marius

-- System Information:
Debian Release: bullseye/sid
  APT prefers testing
  APT policy: (900, 'testing'), (500, 'oldoldstable'), (500, 'stable'), (50, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.9.0-4-amd64 (SMP w/4 CPU threads)
Kernel taint flags: TAINT_PROPRIETARY_MODULE, TAINT_FIRMWARE_WORKAROUND, TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=en_DK.UTF-8, LC_CTYPE=en_DK.UTF-8 (charmap=UTF-8), LANGUAGE=en_US:en
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages ruby-httpclient depends on:
ii  ruby                        1:2.7+2
ii  ruby-http-cookie            1.0.3-1
ii  ruby2.1 [ruby-interpreter]  2.1.5-4
ii  ruby2.2 [ruby-interpreter]  2.2.4-1

ruby-httpclient recommends no packages.

ruby-httpclient suggests no packages.

-- no debconf information