Make /etc/issue configurable per-edition
    
    This patch makes several changes to issue:
    1) Moves both /etc/issue and /etc/issue.net to /usr/lib, with
    symbolic links in /etc
    2) Moves the implementation of /etc/issue to /usr/lib/os.release.d
    to allow for different versions for edition and non-edition versions.
    3) Implements a variant issue file for Fedora Server that includes a
    link to the Cockpit admin console.