[mc] New method of downloading newer spigot server executable.

using double pipe "||", bash will continue to the next statement if the
first statement returns false or has an error. Using the -N option, wget
will overwrite the file if it is newer. So, if the -O option was used,
and both wget commands failed (both http and https were down) then wget
would overwrite the file with a 0 byte copy and effectively delete it.
-N works better in this case, since wget will not overwrite it with an
empty file if it can't download it.

minecraft-server/start-minecraft.sh

@@ -62,9 +62,8 @@ case "$TYPE" in
       ;;
     esac
 
-    #BAD Idea
-    #rm -f $SERVER
-    wget -q https://getspigot.org$URL
+    #attempt https, and if it fails, fallback to http and download that way. Display error if neither works.
+    wget -q -N spigot_server.jar https://getspigot.org$URL || (echo "Falling back to http, unable to contact server using https..." && wget -q -N spigot_server.jar http://getspigot.org$URL) || echo "Unable to download new copy of spigot server"
 
     ;;