Patch for 1.6 to work with short_open_tags off

This patch replaces deprecated usage of '<?' and '<?=' with '<?php' and '<?php echo' respectively.

File has linux patch format. To apply do the following:

$ cd /path/to/osticket

$ patch -u -p1 -i /tmp/osticket.long_php_tags.patch

FYI: using short tags is poor programming practice. Even now it is disabled by default on most systems. Consider change of your coding preferences.