Doesn't compile with latest boost 1.67 -- must accomodate recent io.context and io.service changes

[vivanov879]

[vivanov879]

Since 1.66 boost introduced changes to io.context and io.service https://www.boost.org/doc/libs/1_66_0/doc/html/boost_asio/net_ts.html

[lzx258]

me too! any progress? @vivanov879

[vivanov879]

Had to compile with older boost version. The latest version it compiles with is boost_1_65_1