pfSense

Fix warnings in guiconfig.inc, unexpanded string in get_config_path call

Replace config array accesses in guiconfig.inc

Change some config array accesses in interfaces.php

Replace some config array access in services_dnsmasq.inc

Replace config array accesses in create_interface_list()

Fix multilevel array access outside config in util.inc

• Add generic array get/set path and path_exists functions to util.inc
• Wrap these more generic versions with the confg_* equivalents

Make list assign from explode output safer

• Make the explode limit to the number of expected items
• Assign values by array_shift() to prevent undefined key warns

Fix some undefined variable warnings

Fix several unsafe multilevel config array accesses in setup wizard

Correct single quoted string with parameter expansion