server: Update addrmgr services on outbound conns.
server: Update addrmgr services on outbound conns.

This adds code to update the address manager services for a known
address to the services advertised by peers when they are connected to
via an outbound connection.  It is only done for outbound connections to
help prevent malicious behavior from inbound connections.

Backported from Decred.

tb00/btcd,davecgh/btcd,wallclockbuilder/btcd,dajohi/btcd,ppcsuite/ppcd,ltcsuite/ltcd,davecgh/btcd,dajohi/btcd,dajohi/btcd,ppcsuite/ppcd,btcsuite/btcd,tb00/btcd,btcsuite/btcd,ltcsuite/ltcd,wallclockbuilder/btcd