Added option to convert to mysqli during upgrade

Signed-off-by: jdarwood007 <github2@sleepycode.com>
 Only show MySQLi if the server supports it

Signed-off-by: jdarwood007 <github2@sleepycode.com>
 Only show MySQLi if the server supports it

Signed-off-by: jdarwood007 <github2@sleepycode.com>
Merge pull request #557 from jdarwood007/mysqli-upgrade

 Added option to convert to MySQLi during upgrade
Merge pull request #684 from Arantor/release-2.1

! Mantis bug 4894 - don't close the moderation reports for a post that's...