fix memory leak in http plugin when sockets are reused #210
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This PR fixes a memory leak in the
httpplugin when sockets are reused for multiple requests, for example when settingkeepAliveto true. Since an event handler was attached to the socket directly and never removed for every request, they would slowly add up for the life of the socket.The fix also has the additional benefit that the span will no longer finish early if the connection is closed before all data has been consumed.
Fixes #206