[DBIx-Class-Devel] Branch review request - topic/RT75394

[Peter Rabbitson]

https://github.com/dbsrgits/dbix-class/compare/topic;RT75394

This properly fixes the long-standing RT#75394 (mainly affects anything
based on DBIx::Class::DeploymentHandler).

Since the changeset includes POD and deprecations I want a second set of
eyes before merging it. Read the commit messages for more info.

Please review and merge if no objections.

Cheers