mke2fs: Add support for [devices] stanza in mke2fs.conf

Add the [devices] stanza which allows device-specific defaults to be
specified in the mke2fs.conf file.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
diff --git a/misc/mke2fs.conf.5.in b/misc/mke2fs.conf.5.in
index 1710d70..b0f1ccc 100644
--- a/misc/mke2fs.conf.5.in
+++ b/misc/mke2fs.conf.5.in
@@ -65,7 +65,7 @@
 document.
 .TP 
 .I [defaults]
-Contains relations which define the default parameters 
+Contains relations which define the default parameters
 used by
 .BR mke2fs (8).
 In general, these defaults may be overridden by a definition in the
@@ -395,6 +395,20 @@
 This relation is a boolean which specifies whether the
 .BR mke2fs (8)
 should attempt to discard device prior to filesystem creation.
+.SH THE [devices] STANZA
+Each tag in the
+.I [devices] 
+stanza names device name so that per-device defaults can be specified.
+.TP
+.I fs_type
+This relation specifies the default parameter for the
+.B \-t
+option, if this option isn't specified on the command line.
+.TP
+.I usage_types
+This relation specifies the default parameter for the
+.B \-T
+option, if this option isn't specified on the command line.
 .SH FILES
 .TP
 .I /etc/mke2fs.conf