support

orm: Fix detection of statement failure
orm: Fix type detection of InstrumentedList::add
mysqli: Set object-level character set

without required, internal contact field

Fixes osTicket/osTicket-1.8#203

Fixes #198

Previously, html-like content would have to be run through Format::htmlchars
before being passed to Format::sanitize, because things that looked like
invalid html content would be removed.

A mail client may indicate a header parameter (such as Novell Groupwise,
which may add something like

Content-Disposition: inline; modification-time: "Thu ..."

) Previously, the system would not consider the content to be a candidate
for the email body, because it has parameters to the content-disposition
header.

This patch will still consider the part to be a candidate for the body if
the mime types match and no filename is found in the content-disposition
parameters.

Fixes #191

There's a unique index on %user_email.address, so there's no need to create
an index on %ticket.email when matching up records.