Add numpydoc_validation_overrides option to the docs.

Author: stefmolin

doc/install.rst

@@ -138,3 +138,17 @@ numpydoc_validation_exclude : set
     validation.
     Only has an effect when docstring validation is activated, i.e.
     ``numpydoc_validation_checks`` is not an empty set.
+numpydoc_validation_overrides : dict
+    A dictionary mapping :ref:`validation checks <validation_checks>` to a
+    container of strings using :py:mod:`re` syntax specifying patterns to
+    ignore for docstring validation.
+    For example, to skip the ``SS02`` check for docstrings starting with
+    the word ``Process``::
+
+        numpydoc_validation_overrides = {"SS02": [r'^Process ']}
+
+    The default is an empty dictionary meaning no overrides.
+    Only has an effect when docstring validation is activated, i.e.
+    ``numpydoc_validation_checks`` is not an empty set. Use
+    :ref:`inline ignore comments <inline_ignore_comments>` to turn off
+    specific checks for parts of your code.