Add configuration options for water_ambient spawning

By: md_5 <git@md-5.net>

paper-api/src/main/java/org/bukkit/Server.java

@@ -314,6 +314,26 @@ public interface Server extends PluginMessageRecipient {
      */
     public int getTicksPerWaterSpawns();
 
+    /**
+     * Gets the default ticks per water ambient mob spawns value.
+     * <p>
+     * <b>Example Usage:</b>
+     * <ul>
+     * <li>A value of 1 will mean the server will attempt to spawn water ambient mobs
+     *     every tick.
+     * <li>A value of 400 will mean the server will attempt to spawn water ambient mobs
+     *     every 400th tick.
+     * <li>A value below 0 will be reset back to Minecraft's default.
+     * </ul>
+     * <p>
+     * <b>Note:</b> If set to 0, ambient mobs spawning will be disabled.
+     * <p>
+     * Minecraft default: 1.
+     *
+     * @return the default ticks per water ambient mobs spawn value
+     */
+    public int getTicksPerWaterAmbientSpawns();
+
     /**
      * Gets the default ticks per ambient mob spawns value.
      * <p>
@@ -920,6 +940,14 @@ public interface Server extends PluginMessageRecipient {
      */
     int getWaterAnimalSpawnLimit();
 
+    /**
+     * Gets user-specified limit for number of water ambient mobs that can spawn
+     * in a chunk.
+     *
+     * @return the water ambient spawn limit
+     */
+    int getWaterAmbientSpawnLimit();
+
     /**
      * Gets user-specified limit for number of ambient mobs that can spawn in
      * a chunk.