pfSense

set the serial port appropriately for RCC-VE platforms. sync from factory
repo. Ticket #4720

Conflicts:
etc/inc/pfsense-utils.inc

Return IP correctly in get_interface_ip for gateway groups specifying a
VIP. Ticket #4661

Use 'host!' flag when setting CURLOPT_INTERFACE, as recommended by CURL docs

Pass interface to CURLOPT_INTERFACE instead of IP addres, also use 'if!' flag to avoid CURL trying to resolve the interface name

Code style bits and pieces from etc

Allow option to specify just 1 of user and pass in OpenVPN .up file

As per comment in https://redmine.pfsense.org/issues/3633 sometimes the
server end only requires a password, no username. Usually 1 long string
that serves as the hard-to-guess authentication. OpenVPN expects...

Replae backtickes by mwexec()

Merge pull request #1551 from rnoland/master

Merge pull request #1585 from jlduran/dnsmadeeasy

Merge pull request #1590 from k-paulius/fix-4483v2