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

channels/chan_skinny.c

@@ -7955,9 +7955,13 @@ static struct skinny_device *config_device(const char *dname, struct ast_variabl
 					}
 					ast_mutex_lock(&ltemp->lock);
 					l->instance = ltemp->instance;
+					if (l == temp->activeline) {
+						d->activeline = l;
+					}
 					if (!AST_LIST_EMPTY(&ltemp->sub)) {
 						ast_mutex_lock(&l->lock);
 						l->sub = ltemp->sub;
+						l->activesub = ltemp->activesub;
 						AST_LIST_TRAVERSE(&l->sub, sub, list) {
 							sub->line = l;
 						}