build: Use dnl for all comments in configure.ac, rather than #
build: Use dnl for all comments in configure.ac, rather than #

Former-commit-id: 171651b5fb0953bd538c07811e7c1e08059c977e
syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin,syscoin/syscoin