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/echo_server.c

@@ -20,6 +20,8 @@
 
 #include "lsquic.h"
 #include "test_common.h"
+#include "../src/liblsquic/lsquic_hash.h"
+#include "test_cert.h"
 #include "prog.h"
 
 #include "../src/liblsquic/lsquic_logger.h"
@@ -218,6 +220,7 @@ main (int argc, char **argv)
         }
     }
 
+    add_alpn("echo");
     if (0 != prog_prep(&prog))
     {
         LSQ_ERROR("could not prep");