Document struct_feature.

git-svn-id: http://lm-sensors.org/svn/lm-sensors/branches/lm-sensors-3.0.0@4860 7894878c-1315-0410-8ee3-d5d059ff63e0

lib/libsensors.3

@@ -104,16 +104,32 @@ To start at the beginning of the list, use 0 for nr; NULL is returned if
 we are at the end of the list. Do not try to change these chip names, as
 they point to internal structures!
 
-This structure contains information related to a given subfeature of a
+This structure contains information related to a given feature of a
 specific chip.
 .br
+\fBtypedef struct sensors_feature {
+.br
+  const char *name;
+.br
+  int number;
+.br
+  sensors_feature_type type;
+.br
+} sensors_feature;\fP
+.br
+There are other member not documented here, which are only meant for libsensors
+internal use.
+
+This structure contains information related to a given subfeature of a
+specific chip feature.
+.br
 \fBtypedef struct sensors_subfeature {
 .br
   const char *name;
 .br
   int number;
 .br
-  sensors_feature_type type;
+  sensors_subfeature_type type;
 .br
   int mapping;
 .br