Merge pull request #2660 from J-VdS/schematic

Server disable schematic option (fix #2382)

core/src/mindustry/game/Rules.java

@@ -38,6 +38,8 @@ public class Rules{
     public boolean canGameOver = true;
     /** Whether reactors can explode and damage other blocks. */
     public boolean reactorExplosions = true;
+    /** Whether schematics are allowed */
+    public boolean schematicAllowed = true;
     /** Whether friendly explosions can occur and set fire/damage other blocks. */
     public boolean damageExplosions = true;
     /** Whether fire is enabled. */