update can't access /proc file entry

git-svn-id: http://lm-sensors.org/svn/lm-sensors/trunk@1125 7894878c-1315-0410-8ee3-d5d059ff63e0

doc/FAQ

@@ -664,7 +664,10 @@ you can send us your request.
 
 4.20 Sensors says 'Can't access /proc file'
 
-    Did you 'modprobe sensors'? Check 'lsmod'.
+    (release 2.6.0 and later) Did you 'modprobe i2c-proc'? Check 'lsmod'.
+    (release 2.5.5 and earlier) Did you 'modprobe sensors'? Check 'lsmod'.
+    If you did 'sensors -s', did you run it as root?
+    Do you have /proc support in your kernel (is /proc there?)
 
 
 4.21 Sensors says 'No sensors found!'
@@ -677,7 +680,6 @@ you can send us your request.
     Check 'lsmod'.
 
 
-
 4.22 Sensors output is not correct!
 
     What specifically is the trouble?