[Server Request]Zandronum- Multiplayer Doom

## What game server would you like adding?

Zandronum- Zandronum is a multiplayer-focused source port for Doom/Doom2. Many mods can be hosted off of this base, most notable are Brutal Doom and Quake Champions: Doom Edition.

## Can you link to any tutorials or guides?
-Installation Information-
Zandronum has a both a repository available for Debian/Ubuntu systems, and an archive download available for generic Linux systems. I've copied relevant instructions from this page, which also has download links for the server files.
https://zandronum.com/download

Open a terminal and run the following command sequence:

$ wget -O - http://debian.drdteam.org/drdteam.gpg | sudo apt-key add -
$ sudo add-apt-repository 'deb http://debian.drdteam.org/ stable multiverse'
$ sudo apt-get update
$ sudo apt-get install zandronum doomseeker-zandronum

Install IWADs to ~/.zandronum/
Run Zandronum/Doomseeker from games menu.
or for archive

Extract the tarball to the location of your choice.
Install IWADs to ~/.zandronum/ or other location if you modify the ini.
Run the included binary.

-Other Files Needed-
Doom servers require base .wad files to run. These are files that contain game content.
doom.wad or doom2.wad from a game install will be needed, or the publicly available freedoom1 or freedoom2. I recommend bundling Freedoom and notifying the user they will need to provide their own doom1/2 wad.

https://freedoom.github.io/download.html
Compatability with Freedoom varies mod-to-mod.

With any of these .wad files users can host basic servers.

-Start line and config file information-
I found references to these here-
https://zandronum.com/forum/viewtopic.php?t=807

Example start line:
`./zandronum-server +exec server.cfg -iwad doom2 -file test.wad test.pk3 -optfile test.wad test.pk3 +skill 1 +cooperative 1`
+exec Config File
-iwad Base game file
-file Required files here, maps, mod content, etc.
-optfile Optional files here, HD character images, voxel items, etc
+skill 1-5 easy-hardest

Server start line parameters
https://wiki.zandronum.com/Command_Line_Parameters
Server Flags
https://wiki.zandronum.com/DMFlags

Example server.cfg:

// Server name
sv_hostname "LinuxGSM"
// Server website
sv_website ""
// Cheats on/off
sv_cheats 0
// Infinite Ammo on/off
sv_infiniteammo 0
// Server password
sv_password
// Rcon password
sv_rconpassword
// Maximum player slots
sv_maxclients 10
// If less than maxclients, extra players will spectate match until space is available
sv_maxplayers 10
sv_pure true

Server variable list:
https://wiki.zandronum.com/Server_Variables

-Installing mods-
Mods are mostly archive unpack installations. A user should only have to copy the mod files and change the startup line to match.

While this is aldreay fairly large amount of information, there is a massive chunk of server cvars available for doom/zandronum i'll find and write up later if it's added to LinuxGSM.

## Is the server on Steam?
* [X] No

## Is the server supported on Linux?
* [X] Yes