Lua Telnet crashes in 2.1.3

[HowardL]

What am I doing wrong?

I start VLC with
vlc --rc-quiet --extraintf="rc" --rc-host="127.0.0.1:4400" --telnet-password="x"

Then, I use View->Add Interface->Telnet

Messages reports
main debug: looking for interface module matching "telnet,none": 15 candidates
lua debug: Found lua interface script: C:\Program Files\VideoLAN\vlc213\lua\intf\telnet.luac
lua debug: Setting config variable: config={telnet={host='telnet://localhost:4212',password='******'}}
main debug: using interface module "lua"
lua info: Listening on host "telnet://localhost:4212".
main debug: net: listening to localhost port 4212
lua error: Error loading script C:\Program Files\VideoLAN\vlc213\lua\intf\telnet.luac: ...ckage/win32/../../../share/lua/intf/modules/host.lua:279: attempt to call field 'poll' (a nil value)

So several problems:
1. What am I missing that causes the lua host script to fail with nothing to select on.
2. Why doesn't it see 4400 as the port instead of 4212
3. All this worked on 2.0 so are there no unit tests on the 2.1 lua rewrite (and how would I write them)

[Rémi Denis-Courmont]

1. Code to support Lua net poll on Windows.
2. Backward compatibility with the old VLM "telnet" interface.
3. That stuff was actually pretty broken in 2.0. But no there are no unit tests; contributions welcome.