Index: man/man8/rc.subr.8
===================================================================
--- man/man8/rc.subr.8
+++ man/man8/rc.subr.8
@@ -554,6 +554,13 @@
 This will be passed as arguments to the
 .Xr env 1
 utility.
+.It Va ${name}_env_file
+A file to source for environmental variables to run
+.Va command
+with.
+Note that all the variables, which are being assigned in this file, are going
+to be exported into the environment of
+.Va command .
 .It Va ${name}_fib
 FIB
 .Pa Routing Table