rc.d/dnctl: Chmod +x for consistency with other rc scripts

MFC after: 1 week
Approved by: bnovkov

rc.d: add a service jails config to all base system services

This gives more permissions to services (e.g. network access to
services which require this) when they are started as an automatic
servic

rc.d: add a service jails config to all base system services

This gives more permissions to services (e.g. network access to
services which require this) when they are started as an automatic
service jail.

The sshd patch is important for the sshd-related functionality as
described in the man-page in the service jails part.

The location of the added env vars is supposed to allow overriding them
in rc.conf, and to hard-disable the use of svcj for some parts where it
doesn't make sense or will not work.

Only a subset of all of the services are fully tested (I'm running this
since more than a year with various services started as service jails).
The untested parts should be most of the time ok, in some edge-cases
more permissions are needed inside the service jail.
Differential Revision: https://reviews.freebsd.org/D40371

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Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

Add dnctl rc.d service

As PF now also supports dummynet but can not configure it on its own,
the service which configures pipes, queues and schedulers is needed.

Reviewed by: kp
Differential Revisi

Add dnctl rc.d service

As PF now also supports dummynet but can not configure it on its own,
the service which configures pipes, queues and schedulers is needed.

Reviewed by: kp
Differential Revision: https://reviews.freebsd.org/D37451

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