Fix reload skinny with active devices.

Patch ensures that d->activeline and l->activesub are moved over to the
new device and line so that on callend the appropriate subs can be found
to complete hangup before device resets.

(closes issue ASTERISK-16610)
Reported by: wedhorn
Tested by: snuffy, myself
Patches: 
    skinny-reloadactive01.diff uploaded by wedhorn (license 5019)
........

Merged revisions 380942 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@380943 65c4cc65-6c06-0410-ace0-fbb531ad65f3