Add missing docs and directives related to PEP 3147 and byte-compilation
diff --git a/Doc/c-api/import.rst b/Doc/c-api/import.rst
index 15a11fd..cf48363 100644
--- a/Doc/c-api/import.rst
+++ b/Doc/c-api/import.rst
@@ -142,6 +142,7 @@
    attribute of the module object is set to *cpathname* if it is
    non-``NULL``.  Of the three functions, this is the preferred one to use.
 
+   .. versionadded:: 3.2
 
 .. c:function:: long PyImport_GetMagicNumber()
 
@@ -155,6 +156,8 @@
    Return the magic tag string for :pep:`3147` format Python bytecode file
    names.
 
+   .. versionadded:: 3.2
+
 .. c:function:: PyObject* PyImport_GetModuleDict()
 
    Return the dictionary used for the module administration (a.k.a.