Add a missed SQL index on privacy_list_data table

sql/mysql.sql

@@ -161,6 +161,8 @@ CREATE TABLE privacy_list_data (
 ) ENGINE=InnoDB CHARACTER SET utf8;
 CREATE INDEX i_privacy_list_data_id ON privacy_list_data(id);
 
+CREATE INDEX i_privacy_list_data_id USING BTREE ON privacy_list_data(id);
+
 CREATE TABLE private_storage (
     username varchar(250) NOT NULL,
     namespace varchar(250) NOT NULL,

sql/pg.sql

@@ -161,6 +161,8 @@ CREATE TABLE privacy_list_data (
     match_presence_out boolean NOT NULL
 );
 
+CREATE INDEX i_privacy_list_data_id ON privacy_list_data USING btree (id);
+
 CREATE TABLE private_storage (
     username text NOT NULL,
     namespace text NOT NULL,