Merge branch 'send_destination_prefix' into 'master'

bus/config-parser.c

bus/connection.c

bus/connection.h

bus/policy.c

bus/policy.h

dbus/dbus-string.c

dbus/dbus-string.h

doc/dbus-daemon.1.xml.in

test/Makefile.am

...ample.SendPrefixDenied.SendPrefixAllowed.internal.service

...-activation/com.example.SendPrefixDenied.internal.service

...a/systemd-activation/com.example.SendPrefixDenied.service

.../valid-config-files/send-destination-prefix-rules.conf.in

test/data/valid-config-files/systemd-activation.conf.in

test/dbus-daemon.c

test/sd-activation.c