correct argument order.

add st_gen, st_birthtime.

platform

when the member is available on the platform. (Contributed by
Diego Petteno)

9.

Applies patch #1095802.  Thanks Jack Jansen.

(closes SF patch #1104868)

a generator expression instead of a listcomp.

Not a backport candidate (genexps are new in 2.4).

Clarify that the example assumes no links are present; the point of the
example is to illustrate a need for topdown=False, not to wrestle with
platform-dependent link convolutions.

Also spell os.path.join() out in full, instead of using a shortcut import.
The bug reporter was confused by that too, and it's clearer this way.

Bugfix candidate; but I don't intend to backport it.

Bugfix candidate (the vagaries aren't new <wink>), but I don't intend to
backport this.

popen2.popen2/3/4 functions can be a sequence. All texts are a variation on the
following:

On \UNIX, \var{cmd} may be a sequence, in which case arguments will be passed
directly to the program without shell intervention (as with
\function{os.spawnv()}). If \var{cmd} is a string it will be passed to the shell
(as with \function{os.system()}).

Clarifed that os.environ is captured once; emphasized that it's better
to assign to os.environ than to call putenv() directly (the putenv()
docs said so, but the environ docs didn't).