Disable cron during upgrade

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

Turn off output_compression for downloads

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

Send the object context, as documented

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

Looks like a long standing, yet-to-be-fixed PHP bug, where
zlib.output_compression can result in the output buffer not completely being
flushed. This is especially critical for downloads where the tail of the
file might be lost.

https://bugs.php.net/bug.php?id=19436

Prefer session persistent configuration over database

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

Make the Unpacker arguments extensible
Reviewed-By: Peter Rotich <peter@osticket.com>

This will allow setting something in the session and having that value
override the value from the database. If ->persist() is called for a given
key, a following ->get() will result in the session persisted value being
returned. ->set() will still save the value in the database.

This is mostly useful for last-mile scenarios (and future plugins) that need
to affect the configuration of the system without altering the data in the
configuration table.

Turns out that the $args passed into the run() method of the Unpacker are
not correctly utilized and so, it is not correctly extensible

Add deploy cli script

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

Install may fail on Windows platforms

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

Fix printing / attachment download issues

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

Implement a simple signal (event) architecture

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

This allows another signal condition to the connection, so that, in addition
to the (sub) class, another check can be made before the signal is delivered
to the connected callable

This will allow folks following the git development model to checkout the
sourcecode to one folder, follow an upstream git brach, and deploy the
osticket installation from a current branch to a location somewhere.

The deploy process differs from the unpack process in that it does not
assume to be inside an 'upload/' folder from the install zipball, and it
does not deploy the 'setup/' folder.

The include folder is still supported to be installed elsewhere.

- Force destination folder to always have a trailing slash
- Log if verbosity is set to stdout
- Use MD5 to see if copy is necessary

Inside cli modules, use internal stdout and stderr objects rather than
writing directly to the PHP outputs. This will allow for significantly
easier regression testing integration.

Fix HTTP assumptions in the installer

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

The installer assumes that the CWD of the running PHP process is setup/,
which isn't necessarily true (if run from a cli module, for instance).

Address issues from the cli framework

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

Include all the modules for `php manage.php --help` invocation. Also, pass
the parsed arguments and options to the Module::run() implementation.

Federate configuration settings

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

- timezone_offset was dropped from the config table at 1.7-dpr1
- upgrader: only apply five patches in one request
- upgrader: fix readPatchInfo to work correctly
- session: support migrating from 1.6 (again)
- config: support migrating from 1.6 (fallback)
- config: no default for 'isonline' setting
- config: fix SQL whitespace issue for schema signature fallbacks
- config: hash 1.6 versions in the schema signature lookup
- upgrader: fix logging bug in attachment migration

Allow (a subset of) the configuration to also be saved in the session to
make session-backed data more consistent and compatible with up-and-coming
multi-site setups.

Attachment settings were merged into ticket settings
SMTPSpoofing feature was moved to per-email rather than global

Change the config table from a column-based table to a key-value table
with namespacing. This allows several parts of osTicket to store their
respective configurations in the same table without requiring database
structure updates

'namespace' is reserved in PHP

Add mysqli interface to osTicket

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