hostapd: Document interworking realm EAP Method types

Add link to the EAP type definitions document.

Signed-hostap: Ben Greear <greearb@candelatech.com>

hostapd/hostapd.conf

@@ -1548,6 +1548,8 @@ own_ip_addr=127.0.0.1
 #	    accordance with IETF RFC 4282
 # NAI Realm(s): Semi-colon delimited NAI Realm(s)
 # EAP Method: <EAP Method>[:<[AuthParam1:Val1]>][<[AuthParam2:Val2]>][...]
+# EAP Method types, see:
+# http://www.iana.org/assignments/eap-numbers/eap-numbers.xhtml#eap-numbers-4
 # AuthParam (Table 8-188 in IEEE Std 802.11-2012):
 # ID 2 = Non-EAP Inner Authentication Type
 #	1 = PAP, 2 = CHAP, 3 = MSCHAP, 4 = MSCHAPV2