where appropriate.

is present.  Original patch by Antoine Pitrou.

The new asyncio package now supports the new feature and comes with additional tests for SSL.

Some dbm header files declare the first argument as char * instead of a const char *.

limit EINTR occurrences.

Also fix an analogous bug (not a regression) in the lzma module.

readline() takes a const char* and the other readline_until_enter_or_signal() implementation
already has const char*.

The PyObject_INIT() macros returns obj:

../cpython/Objects/methodobject.c:32:23: warning: expression result unused [-Wunused-value]
        PyObject_INIT(op, &PyCFunction_Type);
                      ^~
../cpython/Include/objimpl.h:139:69: note: expanded from macro 'PyObject_INIT'
    ( Py_TYPE(op) = (typeobj), _Py_NewReference((PyObject *)(op)), (op) )
                                                                    ^
1 warning generated.