update readme for ASIO libraries; remove SDL_net

README.md

@@ -70,10 +70,10 @@ Linux/FreeBSD/other builds are built using autoconf. If you downloaded a source
 
 Aleph One requires a C++17 compiler and the following libraries:
 
++ `ASIO`
 + `Boost`
 + `SDL2`
 + `SDL2_image`
-+ `SDL2_net`
 + `SDL2_ttf`
 + `zlib`
 + `libsndfile`
@@ -93,8 +93,9 @@ First, enable the [RPM Fusion Repository](http://rpmfusion.org/Configuration).
 Then, install the following packages.
 
     sudo dnf install boost-devel curl-devel ffmpeg-devel gcc-c++ \
-      libpng-devel SDL2-devel SDL2_ttf-devel SDL2_image-devel SDL2_net-devel \
-      zziplib-devel miniupnpc-devel openal-soft-devel libsndfile-devel
+      libpng-devel SDL2-devel SDL2_ttf-devel SDL2_image-devel \
+      zziplib-devel miniupnpc-devel openal-soft-devel libsndfile-devel \
+	  asio-devel
 
 If you don't compile with FFmpeg support, you won't be able to use WebM export in Aleph One.
 
@@ -103,9 +104,10 @@ If you don't compile with FFmpeg support, you won't be able to use WebM export i
 Run this command to install the necessary prerequisites for building Aleph One:
 
     sudo apt install build-essential libboost-all-dev libsdl2-dev \
-      libsdl2-image-dev libsdl2-net-dev libsdl2-ttf-dev \
+      libsdl2-image-dev libsdl2-ttf-dev \
       libzzip-dev libavcodec-dev libavformat-dev libavutil-dev libswscale-dev \
-      libpng-dev libcurl4-gnutls-dev libminiupnpc-dev libopenal-dev libsndfile1-dev
+      libpng-dev libcurl4-gnutls-dev libminiupnpc-dev libopenal-dev \
+	  libsndfile1-dev libasio-dev
 
 ### Compile