* proc: changed windows backend to deal with simultaneous breakpoints
* bugfix: forgot to add windowsPrologue3 to the prologues list in e4c7df1
* Tolerate errors returned by Stacktrace in TestStacktraceGoroutine.
* bugfix: proc: propagate debug events we don't cause back to the target process
Fixes: #594
* proc: fixed TestStepConcurrentPtr
Implementation of nextInProgress was wrong.
