Documentation-only change:

- add a reference to the config(5) manpage;
- hopefully clarify the format of the 'env FILENAME' directive.

I am putting these notes in sys/${arch}/conf/GENERIC and not
in sys/conf/NOTES because:

1. i386/GENERIC already had reference to a similar option (hints..)
   and to documentation (handbook)

2. GENERIC is what most users look at when they have to modify or
   create a new kernel config, so having the suggestion there is
   more effective.

I am only touching i386 and amd64 because the other GENERIC files
are already out of sync, and I am not sure what is the overall plan.

MFC after:	3 days

1 files changed, 8 insertions, 2 deletions

diff --git a/sys/amd64/conf/GENERIC b/sys/amd64/conf/GENERIC
index 586165a..da127cf 100644
--- a/sys/amd64/conf/GENERIC
+++ b/sys/amd64/conf/GENERIC
@@ -1,8 +1,8 @@
 #
 # GENERIC -- Generic kernel configuration file for FreeBSD/amd64
 #
-# For more information on this file, please read the handbook section on
-# Kernel Configuration Files:
+# For more information on this file, please read the config(5) manual page,
+# and/or the handbook section on Kernel Configuration Files:
 #
 #    http://www.FreeBSD.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig-config.html
 #
@@ -24,6 +24,12 @@ ident		GENERIC
 # To statically compile in device wiring instead of /boot/device.hints
 #hints		"GENERIC.hints"		# Default places to look for devices.
 
+# Use the following to compile in values accessible to the kernel
+# through getenv() (or kenv(1) in userland). The format of the file
+# is 'variable=value', see kenv(1)
+#
+# env          "GENERIC.env"
+
 makeoptions	DEBUG=-g		# Build kernel with gdb(1) debug symbols
 
 options 	SCHED_ULE		# ULE scheduler