hlist changes caused the peeloff testcase to fail. Investigation shows
that the peeloff sockets is not bound into bind_bucket, so the
bucket has gone away (original socket closed).  Fixing this, shows
a problem that inet->num wasn't set on peeled off sockets, so autobind 
kicks in creating a new bind_bucket.   Ugh.   One bug had been 
hiding the other one all this time. 

Fix 1) peeledoff/accepted sockets need to have their own socket woven 
into the bind_bucket->owner list.  2) Set inet->num, so autobind 
doesn't think it needs to kick in.