Release 2.24.0

- [FEATURE] QUIC and HTTP/3 Internet Draft 31 support.  Drop ID-30
  and ID-31 support.
- [BUGFIX] Divide-by-zero in newly enabled conn stats code when no
  packets were sent.
- [BUGFIX] Memory leak in gQUIC client when server hello cannot be
  parsed.
- [BUGFIX] Server Initial packet size calculation.
- Log user-agent and CONN_CLOSE reason when peer reports error.
- Example programs: Specify ALPN for echo and md5 clients and servers
  (issue #184).
- Example programs: Don't add "QUIC_" prefix to lines in keylog file
  (issue #185).
- http_server: Fix fd leak in preadv mode; fix preadv() usage when
  reading from disk.

bin/prog.c

@@ -610,11 +610,6 @@ keylog_open (void *ctx, lsquic_conn_t *conn)
 static void
 keylog_log_line (void *handle, const char *line)
 {
-    size_t len;
-
-    len = strlen(line);
-    if (len < sizeof("QUIC_") - 1 || strncmp(line, "QUIC_", 5))
-        fputs("QUIC_", handle);
     fputs(line, handle);
     fputs("\n", handle);
     fflush(handle);