message: Work around writable wchar_t* in Py_SetProgramName() pre 3.7
  Fixes
diff: @@ -201,7 +201,10 @@ void PythonAPI::init(int argc, const char** argv) {
  }
  }
  }
  - Py_SetProgramName(L"surelog"); /* optional but recommended */
  + // Before Python 3.7, the parameter to SetProgramName() was not a
  + // const wchar_t* but a wchar_t (even though never written to).
  + static wchar_t progname[] = L"surelog";
  + Py_SetProgramName(progname);
  PyImport_AppendInittab("slapi", &PyInit_slapi);
  