[Xon] Email Queuing Enhancements 2.4.2

Enhances the XenForo Email queue with re-try logic and ensures both the front-end and AdminCP both send via the queue. Note; most email in XenForo 2 goes via the queue.

Features:

• Email Queuing

Email Queuing

This addon ensures that the following email sources go via the email queue,

• AdminCP - Email Users
• Spam Cleaner
• Email Confirmation
• User Moderation - Approval
• User Moderation -Rejection
• Password Reset Request
• Password Reset
• Contact Us

Additionally, any addons which use XenForo's built in Mail object should also be captured.

Adds the following options under "Email Options"