Message 103100 - Python tracker

It would be nice to support the PEP 383 (surrogateescape) for environment variables in os.execvpe(). Attached patch uses PyUnicode_AsEncodedString(val, Py_FileSystemDefaultEncoding, "surrogateescape") to encode an environment variable value.

I'm not sure that PyUnicode_AsEncodedString(val, Py_FileSystemDefaultEncoding, "surrogateescape") does always return a PyBytes object.

I not patched environment keys, but it might be useful.