Fix #3866: Suppress a new warning type: python refs

CHANGES

@@ -68,6 +68,10 @@ Deprecated
 Features added
 --------------
 
+* Now :confval:`suppress_warnings` accepts following configurations:
+
+  - ``ref.python`` (ref: #3866)
+
 Bugs fixed
 ----------
 

doc/config.rst

@@ -239,6 +239,7 @@ General configuration
    * ref.citation
    * ref.footnote
    * ref.doc
+   * ref.python
    * misc.highlighting_failure
    * toc.secnum
    * epub.unknown_project_files

sphinx/domains/python.py

@@ -833,7 +833,7 @@ class PythonDomain(Domain):
         elif len(matches) > 1:
             logger.warning('more than one target found for cross-reference %r: %s',
                            target, ', '.join(match[0] for match in matches),
-                           location=node)
+                           type='ref', subtype='python', location=node)
         name, obj = matches[0]
 
         if obj[1] == 'module':