* extensions/ssh_gateway.php: Added a help tip to show invalid
characters.
* extras/pandoradb_migrate_4.1_to_5.0.postgreSQL.sql,
extras/pandoradb_migrate_4.1_to_5.0.oracle.sql,
extras/pandoradb_migrate_4.1_to_5.0.mysql.sql,
extras/pandoradb_migrate_4.0.x_to_5.0.postgreSQL.sql,
extras/pandoradb_migrate_4.0.x_to_5.0.mysql.sql,
extras/pandoradb_migrate_4.0.x_to_5.0.oracle.sql: Removed duplicated columns.
git-svn-id: https://svn.code.sf.net/p/pandora/code/trunk@8893 c3f86ba8-e40f-0410-aaad-9ba5e7f4b01f