ah, all matches for hosts.hpp are:
libbitcoin-network/include/bitcoin/network/p2p.hpp:#include <bitcoin/network/hosts.hpp>
libbitcoin-network/include/bitcoin/network.hpp:#include <bitcoin/network/hosts.hpp>
libbitcoin-network/Makefile.am: include/bitcoin/network/hosts.hpp \
libbitcoin-network/src/hosts.cpp:#include <bitcoin/network/hosts.hpp>
libbitcoin-network/src/p2p.cpp:#include <bitcoin/network/hosts.hpp>
