message: build: Move interfaces/* to libbitcoin_server
  These are shared between bitcoind and bitcoin-qt. It is unnecessary for
  them to be linked against the other utilities.
diff: @@ -228,6 +228,8 @@ libbitcoin_server_a_SOURCES = \
  httpserver.cpp \
  index/base.cpp \
  index/txindex.cpp \
  + interfaces/handler.cpp \
  + interfaces/node.cpp \
  init.cpp \
  dbwrapper.cpp \
  merkleblock.cpp \
  @@ -414,8 +416,6 @@ libbitcoin_util_a_SOURCES = \
  compat/glibcxx_sanity.cpp \
  compat/strnlen.cpp \
  fs.cpp \
  - interfaces/handler.cpp \
  - interfaces/node.cpp \
  logging.cpp \
  random.cpp \
  rpc/protocol.cpp \
  