(cherry picked from commit 2c97a083)

In the end, it's better to check if the key exists, although it
always should, that's what the key is for....

(cherry picked from commit a60db3ce)

Looks like this name isn't displayed or otherwise used, but
for the sake of consistency fix the typo.

(cherry picked from commit 27791f7a)

get_std_save_message() should be removed eventually, there are only a
few callers left.  Out of lack of imagintion, just fix the apparent
issue and remove the attached filter/firewall message that doesn't
really work because it does not look for "firewall" in the script name.

(cherry picked from commit 32f2ddbc)

(cherry picked from commit 00285185)

* fix translations in traffic shaper

* translation IDS and Proxy

(cherry picked from commit 2c8c4666)

* translate dialog titles; closes #1546
* Some additional strings reported by @DokuKaefer

(cherry picked from commit 25f89aad)

gwlb, found the use... https://github.com/opnsense/core/commit/2dbc3ab259cb7b141d1900b8dea8a503d17ddf72

(cherry picked from commit f296f681)

(cherry picked from commit a6d7bec4)

(cherry picked from commit c5aee741)

It may help users to find what they think are "packages", but
for consistency reasons was recoined as "plugins".

(cherry picked from commit 7b537eba)

(cherry picked from commit 68faafd1)

php7.1, Error at /usr/local/opnsense/www/api.php:26 - Invalid callback OPNsense\Core\Api\MenuController::afterexecuteroute, cannot access protected method OPNsense\Core\Api\MenuController::afterExecuteRoute() (errno=2)

(cherry picked from commit 3e46eb41)

(cherry picked from commit 6c022705)

(cherry picked from commit 32244314)

(cherry picked from commit f802f756)

(cherry picked from commit db0a89bf)

(cherry picked from commit aa1221ae)
(cherry picked from commit 4f58e7f8)
(cherry picked from commit 4169afd1)
(cherry picked from commit ee8955e4)
(cherry picked from commit 2dbc3ab2)
(cherry picked from commit 66511add)
(cherry picked from commit 336cbd67)
(cherry picked from commit 79a6df22)
(cherry picked from commit a5d9897c)

(cherry picked from commit abad6f99)

(cherry picked from commit 622e8dba)

(cherry picked from commit 99973edc)
(cherry picked from commit 95158547)

(cherry picked from commit 1be6437c)

(cherry picked from commit 955e1fca)

(cherry picked from commit 669efa5f)
(cherry picked from commit cccec5ab)
(cherry picked from commit a203c699)
(cherry picked from commit c37e82a9)
(cherry picked from commit 25eeb7c9)
(cherry picked from commit e839ef2c)
(cherry picked from commit 587e6573)
(cherry picked from commit 7f76c06c)
(cherry picked from commit 00dfec8a)

(cherry picked from commit 07f5033b)

(cherry picked from commit 1474f77d)

(cherry picked from commit e7137c1e)

(firewall) add port/address parsing to FilterRule(), should be backwards compatible with current config settings

(cherry picked from commit 58b44880)

(cherry picked from commit 51d2acf4)

(proxy) virtualip's should be added automatically for listening configuration, this was the case for some types, but not for all (CARP)

(cherry picked from commit 83488b67)

(cherry picked from commit b0075a6f)
(cherry picked from commit 69f89b04)
(cherry picked from commit e6dccb60)
(cherry picked from commit 4462372b)
(cherry picked from commit 0c096315)
(cherry picked from commit c7ac2083)
(cherry picked from commit ee0e0eae)
(cherry picked from commit eacf920f)
(cherry picked from commit 6ca40bc4)

(cherry picked from commit 067f0982)
(cherry picked from commit 91de2057)
(cherry picked from commit 1df84c3e)
(cherry picked from commit b6a326b6)
(cherry picked from commit 09959a95)
(cherry picked from commit 77f3cfa8)
(cherry picked from commit 517c2cc9)
(cherry picked from commit b08d26db)

(cherry picked from commit 184c79b1)

(cherry picked from commit 5f17abb3)

(cherry picked from commit b990aad6)

* Now fully pluggable and scheduled for core removal in 17.7
* Added IPv6 functionality to IP probe function
* Multiple fixes in the GUI handling
* Separated RFC 2136 backend
* New RFC 2136 widget
* Style consolidation

(cherry picked from commit ce405243)