Index: share/man/man8/rc.subr.8
===================================================================
--- share/man/man8/rc.subr.8
+++ share/man/man8/rc.subr.8
@@ -29,7 +29,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd July 31, 2020
+.Dd May 18, 2021
 .Dt RC.SUBR 8
 .Os
 .Sh NAME
@@ -780,6 +780,20 @@
 .Dq Li NO .
 .El
 .Pp
+Note that when
+.Ar argument Ns Va _cmd
+is defined and overriding the default method provided by
+.Ic run_rc_command
+then that method is responsible for handling
+additional
+.Va ${name}_option
+that the default method supported. Examples would be
+.Va ${name}_oomprotect
+and
+.Va ${name}_nice .
+Failing to do this, will result in the functionality being not provided without
+any warnings.
+.Pp
 The following variables are available to the methods
 (such as
 .Ar argument Ns Va _cmd )