* bpo-16055: Fixes incorrect error text for int('1', base=1000)

* bpo-16055: Address review comments

in int(), float() and complex() parsers.

This also speeds up parsing non-ASCII numbers by around 20%.

Darwin may not require libm, but it doesn't hurt to link it and simplifies configuration logic.

Access to mkfifo(), mknod() and hard link creation is controled
by SELinux on Android.
Also remove test.support.android_not_root.

It can be removed after https://github.com/python/peps/commit/c28890fb421c906241da6da718f9eacc5a3109ee

Silence only expected AttributeError.

Silence only AttributeError when get "key" and "items" attributes in
the constructor and the update() method of dict and OrderedDict .

Get rid of _PyObject_HasAttrId() and PyDict_GetItemString().
Silence only expected AttributeError, KeyError and ImportError when
get an attribute, look up in a dict or import a module.

The openfp functions of aifp, sunau, and wave had pointed to the open
function of each module since 1993 as a matter of backwards
compatibility. In the case of aifc.openfp, it was both undocumented
and untested. This change begins the formal deprecation of those
openfp functions, with their removal coming in 3.9.

This additionally adds a TODO in test_pyclbr around using aifc.openfp,
though it shouldn't be changed until removal in 3.9.

* Fix compilation of the socket module on NetBSD 8.
* Fix the assertion failure or reading arbitrary data when parse
  a AF_BLUETOOTH address on NetBSD and DragonFly BSD.
* Fix other potential errors and make the code more reliable.

* Silence error output in test_concurrent_futures (bpo-21423)

kB (*kilo* byte) unit means 1000 bytes, whereas KiB ("kibibyte")
means 1024 bytes. KB was misused: replace kB or KB with KiB when
appropriate.

Same change for MB and GB which become MiB and GiB.

Change the output of Tools/iobench/iobench.py.

Round also the size of the documentation from 5.5 MB to 5 MiB.

async and await keywords has been merged into upstream, but they are
all missing in the lexical analysis docs. This change adds them to the
appropriate keywords section in documentation.

Py_UNUSED has a public name, and is used in the wild outside CPython,
but was not documented. Rectify that.

The macro was added in bpo-19976 and referenced in bpo-26179.

The macro was added for bpo-31338 in commit b2e57948