BUG/MINOR: quic: Missing SSL session object freeing

qc_alloc_ssl_sock_ctx() allocates an SSL_CTX object for each connection. It also
allocates an SSL object. When this function failed, it freed only the SSL_CTX object.
The correct way to free both of them is to call qc_free_ssl_sock_ctx().

Must be backported as far as 2.6.

src/quic_ssl.c

@@ -1174,6 +1174,6 @@ int qc_alloc_ssl_sock_ctx(struct quic_conn *qc)
 
  err:
 	TRACE_DEVEL("leaving on error", QUIC_EV_CONN_NEW, qc);
-	pool_free(pool_head_quic_ssl_sock_ctx, ctx);
+	qc_free_ssl_sock_ctx(&ctx);
 	goto leave;
 }