wpa_supplicant: Document HT capability overrides

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

wpa_supplicant/wpa_supplicant.conf

@@ -807,6 +807,34 @@ fast_reauth=1
 # DTIM period in Beacon intervals for AP mode (default: 2)
 #dtim_period=2
 
+# disable_ht: Whether HT (802.11n) should be disabled.
+# 0 = HT enabled (if AP supports it)
+# 1 = HT disabled
+#
+# disable_ht40: Whether HT-40 (802.11n) should be disabled.
+# 0 = HT-40 enabled (if AP supports it)
+# 1 = HT-40 disabled
+#
+# disable_sgi: Whether SGI (short guard interval) should be disabled.
+# 0 = SGI enabled (if AP supports it)
+# 1 = SGI disabled
+#
+# ht_mcs:  Configure allowed MCS rates.
+#  Parsed as an array of bytes, in base-16 (ascii-hex)
+# ht_mcs=""                                   // Use all available (default)
+# ht_mcs="0xff 00 00 00 00 00 00 00 00 00 "   // Use MCS 0-7 only
+# ht_mcs="0xff ff 00 00 00 00 00 00 00 00 "   // Use MCS 0-15 only
+#
+# disable_max_amsdu:  Whether MAX_AMSDU should be disabled.
+# -1 = Do not make any changes.
+# 0  = Enable MAX-AMSDU if hardware supports it.
+# 1  = Disable AMSDU
+#
+# ampdu_density:  Allow overriding AMPDU density configuration.
+#  Treated as hint by the kernel.
+# -1 = Do not make any changes.
+# 0-3 = Set AMPDU density (aka factor) to specified value.
+
 # Example blocks:
 
 # Simple case: WPA-PSK, PSK as an ASCII passphrase, allow all valid ciphers