(cherry picked from commit ceafaf0a)

(cherry picked from commit 55d37aff)

(cherry picked from commit 53f6dace)

(cherry picked from commit 2aca9405)

(cherry picked from commit 809625fd)

(cherry picked from commit f286da8e)

(hasync) add dns resolver to sync, service restart not included, probably needs a seperate page at some point. closes https://github.com/opnsense/core/issues/923

(cherry picked from commit 53c1001b)

(cherry picked from commit c46d5ad0)

(cherry picked from commit 2533e110)
(cherry picked from commit b17d74fa)

(cherry picked from commit a445548a)

(cherry picked from commit 67a3a7e8)

(cherry picked from commit fd4c8acf)

(cherry picked from commit 4021045e)

(cherry picked from commit a404c216)

(cherry picked from commit 6e5fbbc9)

(cherry picked from commit 160c1245)

Taken from: http://www.iana.org/assignments/icmp-parameters/icmp-parameters.xhtml

(cherry picked from commit aa21adfe)

(cherry picked from commit 9ff3fcc7)

(cherry picked from commit 10d4cbfd)

enable the opnsense test ruleset and try to download the eicar virus:

http://www.eicar.org/download/eicar.com.txt

it should block (over http)

closes https://github.com/opnsense/core/issues/884

(cherry picked from commit 16e3ddf2)

(cherry picked from commit 02a40e55)

(cherry picked from commit 09867b53)

(cherry picked from commit fe55eb2d)

(cherry picked from commit f5cd82c6)

(cherry picked from commit f7ceeb3e)

(cherry picked from commit 52a61ae3)

(cherry picked from commit 4f871e40)

(cherry picked from commit 088ca266)

(mvc/fieldtype) add immutable UniqueIdField, @fraenki just add UniqueIdField to your model and this one will autogenerate new unique identifiers for you

(cherry picked from commit 8c35f297)

Example (from @fraenki):
<field>
        <label>Tuning Options</label>
        <type>header</type>
</field>

(cherry picked from commit 95522e09)

(cherry picked from commit 504c0762)

(cherry picked from commit c5c70b93)

(cherry picked from commit 6bd9cdca)

(cherry picked from commit e9369b5c)
(cherry picked from commit 1fa499ac)

(cherry picked from commit 3c2aad98)

(cherry picked from commit 8902faf9)

(ui) html decode ui output (no execute) when fetching form data, closes https://github.com/opnsense/core/issues/898

(cherry picked from commit bd51937a)

(cherry picked from commit da71e1a0)

(cherry picked from commit ce4bb4e7)
(cherry picked from commit 1586ee02)
(cherry picked from commit 58c923b7)