Here is the third version of the docs/manual draft, with a lot more
content filled in, some of it based on previous comments. The biggest
task left is filling in all the implementation-defined behavior. For
plain C functions, J.3.12 gives a nice checklist of things to
document, but POSIX has a lot more things which are specified as
implementation-defined for which I don't have such a nice checklist.
Ideas on how to build one would be great.

Rich