BUG/MINOR: quic: Missing incrementation in NEW_TOKEN frame builder

quic_build_new_token_frame() is the function which is called to build
a NEW_TOKEN frame into a buffer. The position pointer for this buffer
was not updated, leading the NEW_TOKEN frame to be malformed.

Must be backported as far as 2.6.

src/quic_frame.c

@@ -485,6 +485,7 @@ static int quic_build_new_token_frame(unsigned char **pos, const unsigned char *
 		return 0;
 
 	memcpy(*pos, new_token_frm->data, new_token_frm->len);
+	*pos += new_token_frm->len;
 
 	return 1;
 }