[ENH]Improve the text and tips shown to admins when they upgrade or migrate and using the tiki-install.php to write the local.php in the new location or server.
[ENH]Improve the text and tips shown to admins when they upgrade or migrate and using the tiki-install.php to write the local.php in the new location or server.

git-svn-id: 722c0fef737e30edb7d5e851b50e1eda1e207b8c@28048 b456876b-0849-0410-b77d-98878d47e9d5

changi67/tiki,tikiorg/tiki,changi67/tiki,changi67/tiki,oregional/tiki,tikiorg/tiki,oregional/tiki,oregional/tiki,tikiorg/tiki,tikiorg/tiki,oregional/tiki,changi67/tiki,changi67/tiki