[Bug] Hostname is overly restrictive

[Dispersia]

What are you really trying to do?

My temporal instance is hosted behind a reverse proxy at a subpath /temporal

Describe the bug

Temporal and Temporal UI allows this just fine and it works as expected, but the typescript SDK attempts to normalize it and only allows hostname or hostname:port, which prevents being able to connect to an instance.

Minimal Reproduction

Host temporal grpc frontend behind a subpath, try to connect