update to new C roles and directives
diff --git a/Doc/library/sys.rst b/Doc/library/sys.rst
index a8b62da..2ddf5a8 100644
--- a/Doc/library/sys.rst
+++ b/Doc/library/sys.rst
@@ -388,7 +388,7 @@
.. function:: getdlopenflags()
- Return the current value of the flags that are used for :cfunc:`dlopen` calls.
+ Return the current value of the flags that are used for :c:func:`dlopen` calls.
The flag constants are defined in the :mod:`dl` and :mod:`DLFCN` modules.
Availability: Unix.
@@ -533,8 +533,8 @@
+---------------------------------------+---------------------------------+
- This function wraps the Win32 :cfunc:`GetVersionEx` function; see the
- Microsoft documentation on :cfunc:`OSVERSIONINFOEX` for more information
+ This function wraps the Win32 :c:func:`GetVersionEx` function; see the
+ Microsoft documentation on :c:func:`OSVERSIONINFOEX` for more information
about these fields.
Availability: Windows.
@@ -827,7 +827,7 @@
.. function:: setdlopenflags(n)
- Set the flags used by the interpreter for :cfunc:`dlopen` calls, such as when
+ Set the flags used by the interpreter for :c:func:`dlopen` calls, such as when
the interpreter loads extension modules. Among other things, this will enable a
lazy resolving of symbols when importing a module, if called as
``sys.setdlopenflags(0)``. To share symbols across extension modules, call as