* include/db/postgresql.php, include/db/mysql.php,
include/functions_db.php: initial division of the DB core in several
engines, at the moment mysql and postgreSQL (not complete).
* include/functions_config.php, include/config_process.php: change source
code to use new functions.
* install.php: mark the mysql engine (in future select).
git-svn-id: https://svn.code.sf.net/p/pandora/code/trunk@3826 c3f86ba8-e40f-0410-aaad-9ba5e7f4b01f
mdtrooper