Add check-version.sh script and update source.sh script

check-version.sh

@@ -0,0 +1,4 @@
+#!/bin/sh
+
+# Ignore this package
+echo "ignore"

source.sh

@@ -2,7 +2,7 @@
 # BPM Expects the source code to be extracted into the automatically created 'source' directory which can be accessed using $BPM_SOURCE
 # BPM Expects the output files to be present in the automatically created 'output' directory which can be accessed using $BPM_OUTPUT
 
-DOWNLOAD="http://www.libsdl.org/projects/SDL_net/release/SDL_net-${BPM_PKG_VERSION}.tar.gz"
+DOWNLOAD="https://github.com/libsdl-org/SDL_net/archive/refs/tags/release-${BPM_PKG_VERSION}.tar.gz"
 FILENAME="${DOWNLOAD##*/}"
 
 # The prepare function is executed in the root of the temp directory