Based on the conversation from #5 (comment) - this changes innernet's behavior on Linux from automatically falling back to the userspace, instead requiring --backend userspace to be specified.
This should help people avoid weird situations in environments like Docker.
It was dropping the last character in the name, and I modified it to
instead just error on any &str that has a '\0' in it. The strictness
feels acceptable and simplifies the code a bit.
Jake McGinty