Add configuration option for numeric mode #61
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This PR adds a new configuration option
iptables_rules_numericfor thesystem.iptablesrole.This exposes the
numericparameter of the underlyingansible.builtin.iptablesmodule. (since Ansible 2.15)official documentation
With this parameter enabled, hangs due to (reverse) DNS resolution when creating or modifying large chains or policies can be avoided. There's no impact on the functionality of the module.