Two third party packages share the same name

[xwu (Xiaodi Wu)]

SwiftPM uses the last path component of URL as the "identity"; an option to specify explicit dependency names in SE-0226 was rolled back in an amendment due to user confusion.

The reason for not using the package name for package identity was outlined in an amendment to SE-0292, which considered its use as part of a registry service, as follows:

1. It burdens the registry with a requirement to invoke the Swift toolchain to parse the Package manifest
2. It creates competing sources of truth between the {name} parameter in the HTTP request and the declared name
3. It causes confusion among package consumers and maintainers, who may not be aware of the package's declared name, nor understand the distinction between that and the source repository name
   We now propose to migrate existing packages according to their repository name, and have updated the naming rules accordingly. Notably, the use of dashes (-) are now supported.

The core team returned SE-0292 for further discussion about package identifiers, but near as I can tell this discussion never reached a resolution as the proposal authors strongly objected to the core team decision. Based on the links in the proposal, no revision of package identifiers along the lines proposed in SE-0292 ever landed.