Fix crash from console-commands throwing exception. Fixes BUKKIT-2479

When 1.3.1 was released, a try-catch block was removed from the tick
loop that called the method in NMS to handle commands. This restores a
try-catch to prevent the console from crashing the server.

src/main/java/net/minecraft/server/NetServerHandler.java

@@ -106,7 +106,14 @@ public class NetServerHandler extends NetHandler {
         this.h = false;
         ++this.f;
         // this.minecraftServer.methodProfiler.a("packetflow"); // CraftBukkit - not in production code
-        this.networkManager.b();
+        // CraftBukkit start
+        try {
+            this.networkManager.b();
+        } catch (Exception ex) {
+            logger.log(Level.WARNING, "Exception from " + this.player.name, ex);
+            this.disconnect(ex.getClass().getName());
+        }
+        // CraftBukkit end
         // this.minecraftServer.methodProfiler.c("keepAlive"); // CraftBukkit - not in production code
         if ((long) this.f - this.l > 20L) {
             this.l = (long) this.f;

src/main/java/org/bukkit/craftbukkit/CraftServer.java

@@ -485,7 +485,12 @@ public final class CraftServer implements Server {
                 return true;
             }
         }
-        return dispatchCommand(sender, serverCommand.command);
+        try {
+            return dispatchCommand(sender, serverCommand.command);
+        } catch (Exception ex) {
+            getLogger().log(Level.WARNING, "Unexpected exception while parsing console command \"" + serverCommand.command + '"', ex);
+            return false;
+        }
     }
 
     public boolean dispatchCommand(CommandSender sender, String commandLine) {