Updated Building OpenRCT2 on Linux (markdown)

Building-OpenRCT2-on-Linux.md

@@ -4,16 +4,20 @@ This page tells you how to build the project. For instructions on how to get ass
 
 ## Required Packages (General)
 To build natively on Linux, you will need a set of libraries set up. Since most distributions come with a package manager, we expect you to use that. Required libraries include:
-* `SDL2`
-* `SDL2_ttf`
-* `speexdsp`
-* `fontconfig`
-* `jansson`
-* `libzip`
 
-Optional are:
-* `curl`
-* `openssl`
+* `sdl2`
+* `sdl2-ttf (can be disabled)`
+* `fontconfig (can be disabled)`
+* `libzip (>= 1.0)`
+* `libpng (>= 1.2)`
+* `speexdsp`
+* `curl (only if building with http support)`
+* `jansson (>= 2.3)`
+* `openssl (>= 1.0; only if building with multiplayer support)`
+* `iconv (part of glibc on Linux)`
+* `zlib`
+* `gl (commonly provided by Mesa or GPU vendors; can be disabled)`
+* `cmake`
 
 ### APT (Debian, Ubuntu)
 
@@ -33,9 +37,9 @@ This solution is tested continuously with our own dockerfile and then travis.
 
 Install dependencies:
 
-    ```
-    sudo pacman -S sdl2 sdl2_ttf curl jansson speexdsp fontconfig libpng openssl libzip gcc gcc-libs
-    ```
+```
+sudo pacman -S sdl2 sdl2_ttf curl jansson speexdsp fontconfig libpng openssl libzip gcc gcc-libs
+```
 
 ### DNF (Fedora, Tested on 24 rawhide):
 This has not been verified, but should work.