- fixed support for passing source to btest
 - added force_c option to btest
removed pids_to_clean global
 - removed test_sockets
 - removed test_sockets_bi_*
 - removed soon to be redundant test_sockets_select_server_closes_connection
updated and temporarily disabled test_sockets_gethostbyname
 - converted all socket tests to use C for the server-side
 - added new echo client / server test
 - updated websock harness and added new CompiledServerHarness to help run tests on multiple backends