pfSense

Don't call growl if the configured address isn't an IP or resolvable
hostname. Avoids 1 minute timeout delay in fsockopen in growl.class. Cuts
that down to about a 20 second timeout. Ticket #4739

Use CARP IPs that are configured. Ticket #4370

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

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

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()

We need to at least setup the serial port before we try to blast
config data to it. My system was hanging during boot because cat
was couldn't output gps.init to the port.

Return link-local address when we are only requesting IPv6 prefix only if there is no global IPv6 address. In some cases global SLAAC IPv6 address might be present when using DHCPv6. Fixes #4483