[ci skip] Add more patch identifying comments

patches/server/Fix-concurrenct-access-to-lookups-field-in-RegistryO.patch

@@ -19,6 +19,9 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      private static RegistryOps.RegistryInfoLookup memoizeLookup(final RegistryOps.RegistryInfoLookup registryInfoGetter) {
          return new RegistryOps.RegistryInfoLookup() {
 -            private final Map<ResourceKey<? extends Registry<?>>, Optional<? extends RegistryOps.RegistryInfo<?>>> lookups = new HashMap<>();
++            // The concurrent access occurs on the Netty IO threads when serializing packets.
++            // Thus, it seems it was an oversight of the implementator of this function as there
++            // are typically more than one Netty IO thread.
 +            private final Map<ResourceKey<? extends Registry<?>>, Optional<? extends RegistryOps.RegistryInfo<?>>> lookups = new java.util.concurrent.ConcurrentHashMap<>(); // Paper - fix concurrent access to lookups field
  
              @Override