Support SourceTV

[mithrand0]

In source engine games, it's possible to spectate using https://developer.valvesoftware.com/wiki/SourceTV.

For Reactive Drop, this functionality does not work correctly. It has two issues:

1. A bot 'SourceTv' joins the game, this bot becomes the leader of the lobby and cannot be voted out;
2. Enabling causes stutter.

Games like TF2 use it for watching competative games. Would be nice to have SourceTV working for AS:RD too

[BenLubar]

• Prevent SourceTV bot from participating in lobbies.
• Make sure clients can spectate any marine while watching SourceTV.
• Figure out what is causing stutter.

[BenLubar]

Need to test this in multiplayer

[mithrand0]

Tested it, the relay won't connect.

On the game server:

srcds.exe -console -game reactivedrop +port 29001 ... +tv_enable 1 +exec serverconfig.cfg +map lobby

On the relay server:

srcds.exe -console -game reactivedrop +port 29020 +tv_relay 192.168.1.99:29001

log:

Connecting to public(192.168.1.99:29001) ...
0.563:  Sending UDP connect to public IP 192.168.1.99:29001
Server using '<none>' lobbies, requiring pw no, lobby id 0
RememberIPAddressForLobby: lobby 0 from address 192.168.1.99:29001
The server requires that you be running Steam.

[mithrand0]

Tested without the relay server, the following issues are there:

1. When joining over 'steam > game servers > spectate', the spectator becomes a player;
2. The Source TV Bot gets the player icon when selecting a character;
3. There is immense lag for the 'spectator' and the other players.

[wawawawawawawa]

srcds.exe -console -game reactivedrop +port 29001 +tv_enable 1 +map lobby +sv_allow_lobby_connect_only 0 +tv_autorecord 1

Joining works, if in beta there is no sourceTV is connecting... (forever), albeit you still get ready timer.
At this step, if I start Landing Bay, I start to lag like crazy with this error

If I try to press F9, the game insta crash (I assume because sourceTV is connecting?)
I'm also wondering why it says "Can't record on dedicated server." in the log.

In rd folder, there is auto-[stuff].dem, so sourceTV seems to record something.
Sadly if I then try to watch the record with beta client, it says string tables differs, and if I try to watch it with non beta client, it says

ERROR: demo network protocol 7134 outdated, engine version is 7133
Failed to read demo header.

Maybe I'm doing something wrong when trying to set up the server, dunno

[mithrand0]

@wawawawawawawa looks like you are not on the (latest) beta branch