mirror manpages.opensuse.org on RMT instances

[ldzhong]

We have a customer report that man-online failed to access manpages.opensuse.org because of firewall was configured in their system. I am pasting their request here.
'''
I would agree I'm suggesting a feature request, one I didn't know previously to request because the package man-online is new.

The general idea of the request is for some method(s) to be implemented by which a firewalled instance of SLE-Micro could store man pages inside the local network.

This could be as simple as making an rpm package of man pages available to install the man pages on any local system that can afford the space, pretty much the same way SLES15 does today.

Another option would be the ability to have the man pages on a local server that can be reached by http/https. To use a local rmt server for that purpose was just one idea of how the man pages might be available inside the local network, one that might be fairly low-overhead for a system administrator if it is more-or-less automatic by subscribing to the appropriate repository.
'''
For more details please refer to bsc#1230159