Fix preg_replace bugs

If the xml extension for php is not loaded, this patch will do a better job
of honoring line break hints in the html.

Provide fallback html2text mechanism if PHP xml extension is not available

Allow for type and encoding specification of the message body and better
describe the integration with custom form fields.

Upgrade to htmLawed 1.1.16

Remove @id attributes as they could confuse existing id attributes used for
styling and javascript.

Remove @class attributes except for standard ones used by Microsoft® office
which have entries in our thread stylesheet.

Wrap the upgraded email template data in an HTML <div> element so that the
final content is valid HTML. This is useful for the mailer to identify the
message content as HTML

Fix PHP NOTICE level errors for cron jobs executed from the command line

Fixes #4

Validate port during installation

Add help information about the non-standard port number to the popup tips in
the install screen.

Support MySQL 'localhost' connections using a non-standard port number.
Ordinarily, MySQL will ignore the port setting on *nix systems if the host
is specified as 'localhost'

Implements/Fixes #769

This patch makes openssl the preferred source of random data on Windows and
will only use mcrypt_create_iv on PHP 5.3.7 and newer.

Fixes #771

Fixes #772

Previous explain included a nested sub-select, which exponentially increased
the count of the rows to be examined. This patch eliminates one layer of
nesting on the sub-select and dramatically increases the performance finding
orphaned files.

Fixes #773

References:
http://www.osticket.com/forums/forum/osticket-1-7-latest-release/troubleshooting-and-problems-aa/9446-version-1-7-much-slower-than-1-6

Including adding support to the TCL uninitialized variable reader to ignore
class-static variable access as well as detect inline functions and their
closure arguments.

Whether HTML ticket thread is enabled or not, consistently handle the
processing of the email bodies

Some email clients (names omitted to protect the innocent) advertise the
encoding as us-ascii when iso-8859-1 was really implied. This patch allows
the two charsets to be interchangable.