RHEL Host networking in Installation Guide

This bug tracker is for errors with the documentation, use the following as a template and remove or add fields as you see fit. Convert [ ] into [x] to check boxes:

- [X ] This doc is inaccurate in this way:

RHEL 7 Network Configuration link goes to a 404 page on Red Hat side. New possible link is https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/7/html/networking_guide/ch-configuring_ip_networking

Once confirmed feel free to assign it to me and I'll put a patch up

Amy Marrich (spotz)

-----------------------------------
Release: on 2020-05-28 17:21:26
SHA: 1c4ab4c62a31fc3b222e8736af8bfb1fff0b3c21
Source: https://opendev.org/openstack/openstack-manuals/src/doc/install-guide/source/environment-networking.rst
URL: https://docs.openstack.org/install-guide/environment-networking.html