Add autoscan parameters support in config file

Signed-hostap: Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>

wpa_supplicant/wpa_supplicant.conf

@@ -225,6 +225,11 @@ fast_reauth=1
 # of APs when using ap_scan=1 mode.
 #bss_max_count=200
 
+# Automatic scan
+# This is an optional set of parameters for automatic scanning
+# within an interface in following format:
+#autoscan=<autoscan module name>:<module parameters>
+# autoscan is like bgscan but on disconnected or inactive state.
 
 # filter_ssids - SSID-based scan result filtering
 # 0 = do not filter scan results (default)