Florent Xicluna.

information if a failure happens.

This also simplifies the Cmd.get_names() method implementation; it was written
at a time where dir() didn't consider base class attributes.

Small fixes to test_cmd: fix signature of do_shell, remove duplicate import, add option to run the custom Cmd class.

when using the -3 flag.  Patch by Florent Xicluna.

and make it implement the `io.BufferedIOBase` ABC to allow for further
speedups by wrapping it in an `io.BufferedReader`.  Patch by Nir Aides.

binaries running clean prereq after checkout.
1. So, fix the insane make call in build.sh - seems to solve it.
2. Fix a missing redirection.
3. Check in the rsync opts that actually work during upload.

source_address parameter.

Also cleans up an annotation in the socket documentation.

For use by issue3972.

the test suite across all that are available.  Warns about extension modules
that could not be imported when python was compiled with Py_DEBUG.

That warning could be made fatal but I didn't want to do that initially as
I suspect non setup.py based build processes (windows, any others?) won't
compile them all conditionally based on the Py_DEBUG setting today.

to hashlib functions in python 2.x.  The module now uses the 's*' for argument
parsing which auto encodes unicode objects to the system default encoding for
us.