<tls> Update README

Author: jmuecke

README.md

@@ -288,12 +288,14 @@ List of unirec fields exported together with basic flow fields on interface by R
 ### TLS
 List of unirec fields exported together with basic flow fields on interface by TLS plugin.
 
-| Output field        | Type   | Description                                                   |
-|:-------------------:|:------:|:-------------------------------------------------------------:|
-| TLS_SNI             | string | TLS server name indication field from client                  |
-| TLS_ALPN            | string | TLS application protocol layer negotiation field from server  |
-| TLS_VERSION         | uint16 | TLS client protocol version                                   |
-| TLS_JA3             | string | TLS client JA3 fingerprint                                    |
+| Output field |   Type   |                         Description                          |
+|:------------:|:--------:|:------------------------------------------------------------:|
+|   TLS_SNI    |  string  |         TLS server name indication field from client         |
+|   TLS_ALPN   |  string  | TLS application protocol layer negotiation field from server |
+| TLS_VERSION  |  uint16  |                 TLS client protocol version                  |
+|   TLS_JA3    | string   |                  TLS client JA3 fingerprint                  |
+| TLS_EXT_TYPE | uint16\* |          TLS extensions in the TLS Client Hello              |
+| TLS_EXT_LEN  | uint16\* |                 Length of each TLS extension                 |
 
 ### DNS
 List of unirec fields exported together with basic flow fields on interface by DNS plugin.