we want to remove runProgram's ability to provide stdin to a process
because the concurrency issues of handling both stdin and stdout are
much more pronounced once runProgram returns not is collected output
but a source. this is possible in the current c++ framework, however
it isn't necessary in almost all cases (as demonstrated by only this
single user existing) and in much better handled with a proper async
concurrency model that lets the caller handle both at the same time.
Change-Id: I29da1e1ad898d45e2e33a7320b246d5003e7712b
eldritch horrors
2bbdaf0b19