5b6d17 Enable user config

Authored and Committed by carlwgeorge 8 months ago
    Enable user config
    
    Read both `/etc/rpkg/centpkg.conf` and `~/.config/rpkg/centpkg.conf`
    config files, merging the results.  Also define a `--user-config` flag
    to override the later config path, similar to `--config`.  This approach
    is borrowed from fedpkg.
    
    Fixes #23
    
        
file modified
+13 -7