default ipv6_listen_port to listen_port

[bastelfreak]

in 99% of the deployments both ports are identical. to make this easier
for the users we can just tell puppet that the default value for
$ipv6_listen_port is the value of $listen_port. That makes it easier for
people that want their dual stack application to listen on a nonstandard
port. They only need to set it once.

Pull Request (PR) description

This Pull Request (PR) fixes the following issues

[puppet-community-rangefinder]

nginx::resource::mailhost is a type

that may have no external impact to Forge modules.

nginx::resource::server is a type

Breaking changes to this file WILL impact these 13 modules (exact match):

• kalfa-sites
• samuelson-custom_webapp
• akisakye-matomo
• jonhallettuob-existdb
• ploperations-webhook_proxy
• aursu-gitlabinstall
• pgassmann-letsencrypt_nginx
• aursu-dockerinstall
• geoffwilliams-r_profile
• covata-safeshare
• dhollinger-devopsdays
• othalla-nextcloud
• stackstorm-st2

Breaking changes to this file MAY impact these 4 modules (near match):

• aursu-grayloginstall
• 4n0m4l0u5-configure_nginx
• mightp-librenms
• qroac-isp3node

nginx::resource::streamhost is a type

that may have no external impact to Forge modules.

This module is declared in 9 of 576 indexed public Puppetfiles.

---

These results were generated with Rangefinder, a tool that helps predict the downstream impact of breaking changes to elements used in Puppet modules. You can run this on the command line to get a full report.

Exact matches are those that we can positively identify via namespace and the declaring modules' metadata. Non-namespaced items, such as Puppet 3.x functions, will always be reported as near matches only.

[kenyon]

I'm approving the idea, of course need passing tests ;)