#508: ASCII Log Writer precision of time values varies

3) sounds like it could lead to thread-safety issues with the new logging stuff.

Rather than a user-defined function, though, what about allowing the user to specify a date string (with additional UNIX second / fractional second options)?


I generally like this but strftime doesn't give us what we need and
I'm not sure rolling our own is worth it.

So harcoding 6 digits would be fine with me too.

(At some point we want higher resolution, but there'll be many more
places to touch for that ...)