(cherry picked from commit 19174b41)

(cherry picked from commit 525a4ed7)

(cherry picked from commit e81728ba)

(cherry picked from commit 7e51a404)

(cherry picked from commit 835a66bd)

(cherry picked from commit b9f53dee)

(cherry picked from commit ca46899b)

(cherry picked from commit 719c1e92)

(cherry picked from commit 83a3cdbf)

(cherry picked from commit db74e157)

(cherry picked from commit ba433af8)

(cherry picked from commit c4a63d3f)

(cherry picked from commit 9628c0db)

(cherry picked from commit 14e00679)

(cherry picked from commit 4f5144f9)

(cherry picked from commit 3ccabbaa)

(cherry picked from commit 8e849d9e)

(cherry picked from commit 550d4d95)

(cherry picked from commit 493a3d18)

(cherry picked from commit 1e884f54)

(cherry picked from commit 14c93845)

(cherry picked from commit 11368987)

(cherry picked from commit 36bd3115)

(cherry picked from commit 8d7a93c8)

(cherry picked from commit 4941dd32)

(legacy) make disablevlanhwfilter optional + redirect on successful save in system_advanced_network.php

(cherry picked from commit 2fc3baa9)

(cherry picked from commit 3542a33e)

fix mtu parent setting and add max-payload for pppoe

(cherry picked from commit 0953e762)

(cherry picked from commit c3894df0)

(cherry picked from commit 0be62650)

(cherry picked from commit b57f2415)

(cherry picked from commit 8fce959f)

The widget collection needs a cleanup, but is not at the top of the priority list. Lets make sure the legacy functionality delivers output and make sure the already cleaned components stay that way.

(cherry picked from commit d4d07fbb)

(cherry picked from commit 53df54fc)

(cherry picked from commit 6a6f7f3b)

(cherry picked from commit 2de658b9)

o Add $waitforit flag to killbypid() and use it to simplify code.

o When requesting a configure via id, do not exclude the service
  because it is disabled.  The pidfile needs to be killed still.

o Unwind the convoluted code paths in the VPN plugin during early
  configure: kill service, probe for active, then do work.

(cherry picked from commit 2ddb95f7)