Eric Lombrozo issues

Results 3 issues of


                                            Eric Lombrozo

Added an optional parameter to the build command to allow specifying the false positive P.

…ould be sent. Rather than having separate MSG_TX and MSG_WITNESS_TX we can use MSG_TX | MSG_WITNESS_FLAG Same for MSG_BLOCK and MSG_FILTERED_BLOCK

This PR builds atop #23 and #25