better server brand check

platforms/bukkit/src/main/java/com/dfsek/terra/bukkit/TerraBukkitPlugin.java

@@ -133,7 +133,7 @@ public class TerraBukkitPlugin extends JavaPlugin {
     
     @SuppressWarnings({ "deprecation", "AccessOfSystemProperties" })
     private boolean doVersionCheck() {
-        logger.info("Running on version {} with {}.", VersionUtil.getMinecraftVersionInfo(), VersionUtil.getSpigotVersionInfo());
+        logger.info("Running on Minecraft version {} with server implementation {}.", VersionUtil.getMinecraftVersionInfo(), Bukkit.getServer().getName());
         
         if(!VersionUtil.getSpigotVersionInfo().isSpigot())
             logger.error("YOU ARE RUNNING A CRAFTBUKKIT OR BUKKIT SERVER JAR. PLEASE UPGRADE TO PAPER.");