pfSense

Fix display advanced after input error for system_gateways_edit

Use case:
1) Edit a gateway that has no advanced settings (i.e. the Advanced section does not need to open on page load) - that works fine.
2) Modify the Gateway IP Address to something invalid like 1:2::z...

Better handle no dhcpv6 leases file

(cherry picked from commit 2355c154b7598f937ba2121429659f5676ce4d96)

Fix #6872 CP bandwidth 0 is no valid

The front-end validation prevents zero from being entered. "Leave empty" is the way to specify no limit.
(cherry picked from commit b7f2ebb5448f7992cceec899504bdd0a29058fb9)

Make setup_serial_port() write config files safely

This function used to replace /boot.conf, /boot/loader.conf and
/etc/ttys on every call. Depending of the moment a power failure
happens, any of these files can be blank and it'll break console setup
on next boot....

Change safe_write_file $content parameter to accept an array

Make $force_binary parameter optional, default to false

Prevent /etc/ttys to miss essential lines

We do not create /etc/ttys from scratch but we change it on every boot.
If original file is corrupted for some reason we can end up with a file
missing essential lines. Added a check to verify if these lines are
missing and add them back in this case

Merge pull request #3153 from NewEraCracker/RELENG_2_3_2+

Fixup ntpd IPv6 restrict clauses.

This should eliminate the following errors from the ntpd log file when
using IPv6 or dual-stack networks:
"syntax error, unexpected T_Mask, expecting T_EOC"

(cherry picked from commit daed7646d7e8e5d555676299ce660408b490ef81)

Backport save_widget_settings with 3 arguments from RELENG_2_3

Commit 6f1410582412fe771f51bd8b67bcbb952da97db6 introduced code relying on this