Fixes #22291 - update DNS check for broken Rubies
Older rubies don't correctly reverse resolve IPv6, causinga potential issue when a host has a IPv6 forward record.
Copied from katelo-installer issue #22173.
See: http://bugs.ruby-lang.org/issues/12112
Added by Stephen Benjamin over 6 years ago
Fixes #22291 - update DNS check for broken Rubies
Older rubies don't correctly reverse resolve IPv6, causing
a potential issue when a host has a IPv6 forward record.
Copied from katelo-installer issue #22173.
See: http://bugs.ruby-lang.org/issues/12112