Obsoleted-By (optional)
:::::::::::::::::::::::

Indicates that this project is no longer being developed.  The named
project provides a substitute or replacement.

A version declaration may be supplied and must follow the rules described
in `Version Specifiers`_.

The most common use of this field will be in case a project name changes.

Examples::

    Name: BadName
    Obsoleted-By: AcceptableName

    Obsoleted-By: AcceptableName (>=4.0.0)