added info to option docs

Author: mtrezza

src/Options/Definitions.js

@@ -778,7 +778,7 @@ module.exports.DatabaseOptions = {
   enableSchemaHooks: {
     env: 'PARSE_SERVER_DATABASE_ENABLE_SCHEMA_HOOKS',
     help:
-      'Enables database hooks to update single schema cache. Set to true if using multiple Parse Servers instances connected to the same database.',
+      'Enables database real-time hooks to update single schema cache. Set to `true` if using multiple Parse Servers instances connected to the same database. Failing to do so will cause a schema change to not propagate to all instances and re-syncing will only happen when the instances restart. To use this feature with MongoDB, a replica set cluster with [change stream](https://docs.mongodb.com/manual/changeStreams/#availability) support is required.',
     action: parsers.booleanParser,
     default: false,
   },

src/Options/docs.js

@@ -191,5 +191,5 @@
 
 /**
  * @interface DatabaseOptions
- * @property {Boolean} enableSchemaHooks Enables database hooks to update single schema cache. Set to true if using multiple Parse Servers instances connected to the same database.
+ * @property {Boolean} enableSchemaHooks Enables database real-time hooks to update single schema cache. Set to `true` if using multiple Parse Servers instances connected to the same database. Failing to do so will cause a schema change to not propagate to all instances and re-syncing will only happen when the instances restart. To use this feature with MongoDB, a replica set cluster with [change stream](https://docs.mongodb.com/manual/changeStreams/#availability) support is required.
  */

src/Options/index.js

@@ -413,7 +413,7 @@ export interface FileUploadOptions {
 }
 
 export interface DatabaseOptions {
-  /* Enables database hooks to update single schema cache. Set to true if using multiple Parse Servers instances connected to the same database.
+  /* Enables database real-time hooks to update single schema cache. Set to `true` if using multiple Parse Servers instances connected to the same database. Failing to do so will cause a schema change to not propagate to all instances and re-syncing will only happen when the instances restart. To use this feature with MongoDB, a replica set cluster with [change stream](https://docs.mongodb.com/manual/changeStreams/#availability) support is required.
   :DEFAULT: false */
   enableSchemaHooks: ?boolean;
 }