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

i18n: Much better compat imll of mb_* funcs

Reviewed-By: Peter Rotich <peter@osticket.com>

The original compatibility functions for the mb_strlen, mb_strpos, and
mb_substr functions was not implemented correctly. This patch uses the PCRE
library to do Unicode processing

pipe: Use Delivered-To and Message-Id from outer

Reviewed-By: Peter Rotich <peter@osticket.com>

If a wrapped mail is sent, copy the Delivered-To header into the nested
message so it will be clear(er) how the mail arrived into the system. Also,
copy the Message-Id into the nested mail if there is none to help against
mails delivered repeatedly.

oops: Fix report time frame interpretation

Reviewed-By: Peter Rotich <peter@osticket.com>

Fix E_STRICT output from config class

Reviewed-By: Peter Rotich <peter@osticket.com>

Send staff alerts as Notice as opposed to an AutoRely

Reviewed-By: Jared Hancock <jared@osticket.com>

Some emails providers (e.g gmail/google) won't deliver emails marked
bulk/autoreply to group email address.

Ensure images, when initially placed, have a width

Reviewed-By: Peter Rotich <peter@osticket.com>

html: PHP DomDocument classes are in the `dom` ext

Reviewed-By: Peter Rotich <peter@osticket.com>

Fixup Unicode whitespace mangling

Reviewed-By: Peter Rotich <peter@osticket.com>

Fix a few link issues in the ticket thread

Reviewed-By: Peter Rotich <peter@osticket.com>

Until we add text/plain bodies to the ticket thread without an enclosing
<pre> element, we should not treat the <pre> element like a code or
blockquote block.

On some combinations of operating systems, PHP and libpcre versions, `\s`
will match the iso-8859-x non-breaking-space, 0xa0. This regular expression
will munge the UTF8 encoded version, 0xc2a0 to 0xc220, which is not a valid
UTF8 character.

When inserted into a UTF8 field in mysql, the text will be truncated at and
after the first invalid character.

These functions don't appear to be used an could corrupt UTF-8 encoded text

Feature/auto replies

Reviewed-By: Jared Hancock <jared@osticket.com>

Fixes a few E_NOTICE messages
Drops bounce checking inside autoReply checking

mysqli: Retry on deadlock-found error

Reviewed-By: Peter Rotich <peter@osticket.com>

If MySQL error #1213 (deadlock found when trying to get lock) is returned
from query, it is safe to retry the query.

This patch will retry queries up to two times for a total of three. If the
query cannot be executed without error #1213 after the third time, the error
is logged as usual, and the system continues with the failed query.

Rename routines to make it a little clear on what they do

This patch addresses an issue where a client may have upper-case letters in
their email address. When visiting the client portal to check the ticket
status, previously, the exact same case would be required in the 'Email
Address' box.

This patch removes the case sensitivity for email logins.

Fixup a few email piping issues

Reviewed-By: Peter Rotich <peter@osticket.com>

If the content of the message is of type `message/rfc822`, then support
downloading the body of the message and sending it off to the mail parsing
system, simulating a piped email.

Previously, if a message had a Content-Disposition header, then it could not
be considered as the body of the message.

If the mail received into the system has a content type of 'message/rfc822',
then unwrap the inner message and use it as the parsed email. Effectively,
assume the email was forwarded as an message/rfc822 attachment.

Previously, the subject was duplicated, which is really confusing

Exclude the auto-responding email from possible alerts sent to staff

The concern here is possible loop when an alert to staff bounces back to the
system.

Disable auto-response on a bounce.