Prepare database to be ready for a future fix on sessions

htdocs/install/mysql/migration/12.0.0-13.0.0.sql

@@ -528,3 +528,13 @@ CREATE TABLE llx_zapier_hook(
     import_key varchar(14)
 ) ENGINE=innodb;
 
+
+CREATE TABLE llx_session(
+  session_id varchar(50) PRIMARY KEY,
+  session_variable text,
+  last_accessed datetime NOT NULL,
+  fk_user integer NOT NULL,
+  remote_ip varchar(64) NULL,
+  user_agent varchar(128) NULL
+)ENGINE=innodb;
+

htdocs/install/mysql/tables/llx_session.sql

@@ -0,0 +1,28 @@
+-- ========================================================================
+-- Copyright (C) 2020 Laurent Destailleur  <eldy@users.sourceforge.net>
+--
+-- This program is free software; you can redistribute it and/or modify
+-- it under the terms of the GNU General Public License as published by
+-- the Free Software Foundation; either version 3 of the License, or
+-- (at your option) any later version.
+--
+-- This program is distributed in the hope that it will be useful,
+-- but WITHOUT ANY WARRANTY; without even the implied warranty of
+-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+-- GNU General Public License for more details.
+--
+-- You should have received a copy of the GNU General Public License
+-- along with this program. If not, see <https://www.gnu.org/licenses/>.
+--
+-- This table can be used for user defined session management
+-- ========================================================================
+
+create table llx_session
+(
+  session_id varchar(50) PRIMARY KEY,
+  session_variable text,
+  last_accessed datetime NOT NULL,
+  fk_user integer NOT NULL,
+  remote_ip varchar(64) NULL,
+  user_agent varchar(128) NULL
+)ENGINE=innodb;