Updating Xonotic Documentation (#108)

* First Documentation of Server Config Location

* Updating Summary and editing Xonotic Documentation

* Update xonotic.md

* Final Draft of Documentation

* Grammar checked

* Remove Spellcheck

* Spell checked

* Reverting accidently overwritten documentation

* Adding Logo in Documentation

* Removing one faulty bulletpoint

---------

Co-authored-by: Stephan Schaffner <stephan.schaffner@check24.de>
Co-authored-by: Daniel Gibbs <me@danielgibbs.co.uk>

Author: 3 people

game-servers/xonotic.md

@@ -1,4 +1,5 @@
 # Xonotic
+![Xonotic Logo](https://xonotic.org/static/img/xonotic_logo_web.svg)
 
 ## Server Resources
 
@@ -12,7 +13,7 @@
 
 ### Client Specific
 
-Like written in the FAQ the default Configuration files are located in:
+As written in the FAQ, the default Configuration files are located in:
 
 | System | Location |
 |--|--|
@@ -35,7 +36,7 @@ A list is currently located in [Xonotic Gitlab](https://gitlab.com/xonotic/xonot
 | Capture the Flag | ctf | Teambased Gamemode where the enemy flag has to be captured and brought back to their own base |
 | Clan Arena | ca | Team and Round-based Mode where the surviving team gets a point. Pickup Items are absent |
 | Freeze Tag | ft | Like Teamdeathmatch, where killed players are frozen and can be revived by team members. Ammo Pickups are absent |
-| Key Hunt | kh | Multiteam- and Roundbased Mode Mode where one player of each team gets a key and the team goal is to get all keys | 
+| Key Hunt | kh | Multiteam- and Roundbased Mode Mode where one player of each team gets a key and the team goal is to get all keys |
 | Assault | as | Team- and Round-based Mode where one Team is attacking and the other defending. Attackers try to destroy objects as fast as possible |
 | Domination | dom | Multiteambased Gamemode where the teams capture and control points on the map |
 | Last Man Standing | lms | Free for All Gamemode where you only respawn a certain amount of time |
@@ -45,3 +46,25 @@ A list is currently located in [Xonotic Gitlab](https://gitlab.com/xonotic/xonot
 | Race | rc | Free for all Gamemode where players try to run over a track as fast as possible |
 | Complete the Stage | cts | Like Race Gamemode with additional Checkpoints to pass |
 | Nextball | nb | Team and Round-based Mode where teams try to shoot a ball to the enemy goal |
+
+## Custom Maps
+
+### Server side
+
+Xonotic has Custom Maps support in fileformat `pk3`. Maps should be located in the data folder like `server.cfg` on your dedicated Server.
+
+### Make it useable for Clients
+
+Xonotic doesn't provide a Filedownloader inside the gameserver, have need to host your custommaps on HTTP Webspace and set the correct values in `server.cfg`.
+
+#### Example
+
+- Userdir: `-userdir /home/xonotic/server1`: add `foo.pk3`in `/home/xonotic/server1/data/`
+-  `server.cfg`: Add `sv_curl_defaulturl="http://xonotic.foo.bar"`
+- Put `foo.pk3` in the HTTP Root Folder to make it accessable via `http://xonotic.foo.bar/foo.pk3`
+
+Look at [Xonotic Wiki](https://gitlab.com/xonotic/xonotic/-/wikis/Automatic-map-downloads) for more infos about Custom Map Hosting
+
+## Start parameters
+
+Every Server cvar can be overwritten in an starting argument, but it's recommended to setup as much as possible in `server.cfg`