Support linking to target outside of homedir

[marcospb19]

I have a config file that lives in the /usr/share/X11/xkb/symbols/ folder.

It would be great if dotin had some feature to deal with this.

However, /usr/share/X11/xkb/symbols/ requires privileged rights, there's no way around it.

[marcospb19]

Well, here's an idea: have root be a reserved name, and allow it to be processed while reading a relative path.

~
└── dotfiles
    └── root
        └── usr
            └── share
                └── X11
                    └── xkb
                        └── symbols
                            └── moao