bpo-36900: Replace global conf vars with config (GH-13299)

Replace global configuration variables with core_config read from the
current interpreter.

Cleanup dynload_hpux.c.
diff --git a/Objects/bytearrayobject.c b/Objects/bytearrayobject.c
index 6672136..eaf5dce 100644
--- a/Objects/bytearrayobject.c
+++ b/Objects/bytearrayobject.c
@@ -998,7 +998,8 @@
 static PyObject *
 bytearray_str(PyObject *op)
 {
-    if (Py_BytesWarningFlag) {
+    _PyCoreConfig *config = &_PyInterpreterState_GET_UNSAFE()->core_config;
+    if (config->bytes_warning) {
         if (PyErr_WarnEx(PyExc_BytesWarning,
                          "str() on a bytearray instance", 1)) {
                 return NULL;
@@ -1023,7 +1024,8 @@
     if (rc < 0)
         return NULL;
     if (rc) {
-        if (Py_BytesWarningFlag && (op == Py_EQ || op == Py_NE)) {
+        _PyCoreConfig *config = &_PyInterpreterState_GET_UNSAFE()->core_config;
+        if (config->bytes_warning && (op == Py_EQ || op == Py_NE)) {
             if (PyErr_WarnEx(PyExc_BytesWarning,
                             "Comparison between bytearray and string", 1))
                 return NULL;