--- src/cf.data.pre.orig	2025-01-31 08:52:43 UTC
+++ src/cf.data.pre
@@ -5552,6 +5552,10 @@ DOC_START
 LOC: Config.pidFilename
 DOC_START
 	A filename to write the process-id to.  To disable, enter "none".
+
+	Note: If you change this setting, you need to set squid_pidfile
+	in /etc/rc.conf to reflect the new value. Please see
+	/usr/local/etc/rc.d/squid for details.
 DOC_END
 
 NAME: client_netmask
