Description of problem:

Information is not clear about considerations/requirements when pushing Docker content to Satellite

How reproducible:

100%

Is this issue a regression from an earlier version:

Steps to Reproduce:

https://docs.redhat.com/en/documentation/red_hat_satellite/6.16/html/managing_content/Managing_Container_Images_content-management#Using_Container_Registries_content-management

1. Checking the docs, we can see the message below

The pushed container registry name must contain only lowercase characters. 

2.

3.

Actual behavior:
My understanding is that the "container registry name" is related to the registry name only, and not the whole container string, right?

# podman search wallsat616-rhel8.d.sysmgmt.cee.redhat.com/
NAME                                                                                   DESCRIPTION
wallsat616-rhel8.d.sysmgmt.cee.redhat.com/acme-container_stuff-ubi8_httpd-24 

Above, we can see the string

wallsat616-rhel8.d.sysmgmt.cee.redhat.com/acme-container_stuff-ubi8_httpd-24

About the statement "pushed container registry name must contain only lowercase characters", this refer to "wallsat616-rhel8.d.sysmgmt.cee.redhat.com/acme-container_stuff-ubi8_httpd-24" or "wallsat616-rhel8.d.sysmgmt.cee.redhat.com"

Based on this doc [1], the registry name should be only the server FQDN

For example, the registry.redhat.io/ubi8/ubi container image is identified by:    
    - Registry server (registry.redhat.io)
    - Namespace (ubi8)
    - Image name (ubi)  

[1]. https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/8/html/building_running_and_managing_containers/working-with-container-registries_building-running-and-managing-containers#con_container-registries_working-with-container-registries

Expected behavior:
Accurate information in our docs

Business Impact / Additional info:

This is causing some issues, in the same document, we can see the information below

podman push My_Container_Image_Hash satellite.example.com/My_Organization_Label/My_Product_Label/My_Repository_Name[:_My_Tag_]
podman push My_Container_Image_Hash satellite.example.com/id/My_Organization_ID/My_Product_ID/My_Repository_Name[:_My_Tag_] 

Above, we can see the examples with the capital letter "My_Product_Label", for instance, and assuming that my label on Satellite is something as Container, this will not work, once the complete URL "registry + namespace + image" has to be in lowercase.