emrtd: Improve comment on USA quirk workaround

client/src/cmdhfemrtd.c

@@ -218,9 +218,9 @@ static int emrtd_get_asn1_data_length(uint8_t *datain, int datainlen, int offset
     if (lenfield <= 0x7f) {
         return lenfield;
     } else if (lenfield == 0x80) {
-        // TODO: 0x80 means indeterminate.
+        // TODO: 0x80 means indeterminate, and this impl is a workaround.
         // Giving rest of the file is a workaround, nothing more, nothing less.
-        // More at https://letsencrypt.org/docs/a-warm-welcome-to-asn1-and-der/
+        // https://wf.lavatech.top/ave-but-random/emrtd-data-quirks#EF_SOD
         return datainlen;
     } else if (lenfield == 0x81) {
         return ((int) * (datain + offset + 1));