Stem can't fetch hidden service descriptors with descriptor ID.

https://gitweb.torproject.org/torspec.git/tree/control-spec.txt#n1548

"HSFETCH" SP (HSAddress / "v" Version "-" DescId)
              *[SP "SERVER=" Server] CRLF

Control-spec states that HSFETCH can be done with a specific descriptor ID, but because stem enforcesa address check with stem.util.tor_tools.is_valid_hidden_service_address() this can't be done.

Trac:
Username: moonsikpark