* More Python3 lint fixes
Some of the issues addressed include:
* Don't use `l` as a variable name (confusable with `1` or `I`)
* `print` statement does not exist in Py3, use `print` function instead
* Implicit tuple deconstruction in function args is no longer supported,
use explicit splat `*` at the call site instead
* `xrange` does not exist in Py3, use `range` instead
* Better name per review feedback
The Remote Mirror interop header now accepts an arbitrary number of remote mirror libraries so that it can have 4.1, 4.2, and 5.0 loaded side by side.
rdar://problem/45808282