Log ignored warning messages as info

doc/changelog.txt

@@ -3,6 +3,7 @@
 Changes:
 - Minimum Python version required is 3.8
 - HTTP redirect causes a warning, http-redirected
+- Ignored warning messages are logged as information
 
 
 10.2.1 (released 05.12.2022)

doc/src/man/linkcheckerrc.rst

@@ -116,7 +116,7 @@ filtering
     Command line option: :option:`--ignore-url`
 **ignorewarnings=**\ *NAME*\ [**,**\ *NAME*...]
     Ignore the comma-separated list of warnings. See `WARNINGS`_ for
-    the list of supported warnings.
+    the list of supported warnings. Messages are logged as information.
     Command line option: none
 **internlinks=**\ *REGEX*
     Regular expression to add more URLs recognized as internal links.

linkcheck/checker/urlbase.py

@@ -384,11 +384,11 @@ class UrlBase:
         Add a warning string.
         """
         item = (tag, s)
-        if (
-            item not in self.warnings
-            and tag not in self.aggregate.config["ignorewarnings"]
-        ):
-            self.warnings.append(item)
+        if item not in self.warnings:
+            if tag in self.aggregate.config["ignorewarnings"]:
+                self.add_info(s)
+            else:
+                self.warnings.append(item)
 
     def add_info(self, s):
         """