Addresses three security advisories: PMASA-2018-06, PMASA-2018-07, PMASA-2018-08. Also includes additional non-security related code updates. ChangeLog: https://www.phpmyadmin.net/files/4.8.4/ PR: 233953 MFH: 2018Q4 Security: ed10ed3f-fddc-11e8-94cf-6805ca0b3d42