Redirect deleted page and fix some references

Author: javiereguiluz

_build/redirection_map

@@ -514,3 +514,4 @@
 /service_container/3.3-di-changes https://symfony.com/doc/3.4/service_container/3.3-di-changes.html
 /frontend/encore/shared-entry /frontend/encore/split-chunks
 /testing/functional_tests_assertions /testing#testing-application-assertions
+/logging/monolog_regex_based_excludes /logging/monolog_exclude_http_codes

logging.rst

@@ -379,11 +379,6 @@ Learn more
     logging/monolog_exclude_http_codes
     logging/monolog_console
 
-.. toctree::
-    :hidden:
-
-    logging/monolog_regex_based_excludes
-
 .. _`the twelve-factor app methodology`: https://12factor.net/logs
 .. _PSR-3: https://www.php-fig.org/psr/psr-3/
 .. _`stderr`: https://en.wikipedia.org/wiki/Standard_streams#Standard_error_(stderr)