If a non-text attachment specifies a charset in the content-type header,
don't transcode the content before saving it to the database. This can
corrupt attachments which have a header like the following:

Content-Type: application/pdf; charset=UTF-8

Since a PDF contains binary data, coercing it to UTF-8 encoding will drop
characters not valid in UTF-8 and will corrupt the attachment data.

Also support the TransportName in the properties list and prefer it over the
attachment-level attribute, as it is Unicode encoded.

The priority setting was broken when priority was added to the dynamic data

This is necessary to make sure session data is saved on redirect.

Also allow an administrator to lift the force password change flag without
specifying a new password.

Duplicate delivered-to handling from mail parse as temp. solution.

Previously, the data blocks were inspected byte for byte. Now data blocks
are parsed 1k at a time. Fewer PHP function calls ultimately means faster
performance.

Separate authentication strike (excessive login attempts) count from timeout
enforcement.

Unfortunately, this is necessary because some mail clients send in content without defining
the charset or at worse using freaking wrong/invalid charsets like
'default'!

This should speed up the system where several emails and alerts will be sent
through the same SMTP account in the same request.

If the system has only one help topic automatically select the help topic
and display any associated custom form.

Priority field and custom list fields have a prompt value (shows up only for
drop-down widget). And the short and long answer fields have a placeholder
configuration item.

This is necessary so we don't add delivered-to addresses to the list of
addressee/collaborators.

necessary to avoid adding internal virtual address as a collaborator.

Store delivered-to email ID - giving us the ability to reply FROM specific
email address as opposed to the department's email.

This is needed to help us remove invalid characters set by some mail
clients.

Previously, the Delivered-To header was only used if the To header was not
found