Update to 2.7.1
    
    Along with many fixes:
    
    * Consistent indent
    * Requires → Recommends for optional binaries
    * Add Recommends/Requires for groff to get autocompletion from manpages
    * Ship pkg-config file because it is **useful**
    * Sync shells scriptlets with Fedora Packaging Guidelines
    * Include COPYING
    
    Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1508180
    Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1514319
    Signed-off-by: Igor Gnatenko <ignatenkobrain@fedoraproject.org>