This is my attempt at removing similar texts from the translator work load.
It also makes an attempt at dropping some misspelled words and works toward
standardizing some phrases.

This adds a command-line module named `serve` which adds a module to run the
command-line built-in PHP server with a router file that will properly
handle the expected URL dispatchers for the pages/, api/, and apps/ magic
URLs.

Usage:

$ php manage.php serve --help

This patch suggests that old attachments in the `upload_dir` can be located
and left alone when upgrading away from osTicket v1.6. Later, via the `file`
command line applet, the attachments can be migrated into the database, or
to the new filesystem plugin after it is installed with:

    php manage.php file migrate --backend=6 --to=D

This allows attachment migration to be retried in the event it failed for
any reason.

(rather than deleted after install)