One more program that is affected by this bug is rt-mailgate from rt3.8-clients:
# echo test \ | (cd / && su www-data -c '/usr/bin/rt-mailgate \ --debug --action=correspond \ --queue=General \ --url="https://ipv6.google.com/rt/"') /usr/bin/rt-mailgate: temp file is '/tmp/1q919srzpU' /usr/bin/rt-mailgate: connecting to https://ipv6.google.com/rt//REST/1.0/NoAuth/mail-gateway An Error Occurred ================= 500 Can't connect to ipv6.google.com:443 (Bad hostname 'ipv6.google.com') /usr/bin/rt-mailgate: undefined server error # A similar error is signalled should https://[::1]/rt/ (i. e., ip6-localhost) be used for an URI. Strangely enough, https://ip6-localhost/rt/ works, yet Apache's access.log shows that rt-mailgate(1) connects over IPv4 instead of IPv6. -- FSF associate member #7257
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