tls: streaming mode for application records

To avoid overhead of stream buffering for records we don't do
much with anyway, pass through application records instead of
buffering the entire record in the stream engine.

src/app-layer-ssl.c

@@ -2371,11 +2371,17 @@ static struct SSLDecoderResult SSLv3Decode(uint8_t direction, SSLState *ssl_stat
             ssl_state->curr_connp->record_length, ssl_state->curr_connp->bytes_processed, record_len);
 
     if (ssl_state->curr_connp->record_length > input_len - parsed) {
+        /* no need to use incomplete api buffering for application
+         * records that we'll not use anyway. */
+        if (ssl_state->curr_connp->content_type == SSLV3_APPLICATION_PROTOCOL) {
+            SCLogDebug("application record");
+        } else {
             uint32_t needed = ssl_state->curr_connp->record_length;
             SCLogDebug("record len %u input_len %u parsed %u: need %u bytes more data",
                     ssl_state->curr_connp->record_length, input_len, parsed, needed);
             return SSL_DECODER_INCOMPLETE(parsed, needed);
         }
+    }
 
     if (record_len == 0) {
         return SSL_DECODER_OK(parsed);