Unable to generate multiple VFS into same package

[curio77]

It is impossible to generate multiple vfsgen instances into the same package because the generated files will conflict due to each of them defining a vfsgen۰FS type. To avoid this, the user should be able to specify the type name as well, or it should include the designated instance name.

[dmitshur]

Yes, there is a limit of one vfsgen-generated filesystem variable per package with the current design. There are some advantages and disadvantage to it. In many cases, using a union filesystem removes the need for generating more than 1 FS per package, but otherwise multiple packages need to be used. See #23 (comment) for more details.

I'll close this as duplicate of #23.