New MailScanner Front-End (MSFE) v9.00

Changes:

• Added BETA support for DirectAdmin on RHEL/CentOS/CL v7 and v8. This only uses the new Exim named queue method which requires Exim v4.93+
• Added support for SpamBox delivery to <mailbox>.spam folder (SpamBox) on cPanel and DirectAdmin
• Added support for Exim named queue method for MailScanner. Targeted, better use of resources, independent of cPanel configuration. Not all outgoing email scanned or logged to mailcontrol. Requires Exim v4.93+
• Added MySQL v8.0 support
• RHEL/CentOS/CL v8.1 OS support
• Removed use of Mail::Sender as it is now deprecated
• Moved /usr/mscpanel to /usr/msfe (symlink added for backwards compatibility)
• MailControl UI now performs to/from sorts by domain and then email address rather than just email address