Commits on Jan 22, 2019

1. Allow connections from misbehavior banned peers. …

   This allows incoming connections from peers which are only banned
    due to an automatic misbehavior ban if doing so won't fill inbound.
   
   These peers are preferred for eviction when inbound fills, but may
    still be kept if they fall into the protected classes.  This
    eviction preference lasts the entire life of the connection even
    if the ban expires.
   
   If they misbehave again they'll still get disconnected.
   
   The main purpose of banning on misbehavior is to prevent our
    connections from being wasted on unhelpful peers such as ones
    running incompatible consensus rules.  For inbound peers this
    can be better accomplished with eviction preferences.
   
   A secondary purpose was to reduce resource waste from repeated
    abuse but virtually any attacker can get a nearly unlimited
    supply of addresses, so disconnection is about the best we can
    do.

   

   gmaxwell committed Jan 22, 2019
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