Configure: check for QUIC 0-RTT support at compile time.

auto/lib/openssl/conf

@@ -165,13 +165,4 @@ with nginx by using --with-openssl=<path> option.
 END
         exit 1
     fi
-
-    ngx_feature="OpenSSL QUIC 0-RTT context"
-    ngx_feature_name="NGX_OPENSSL_QUIC_ZRTT_CTX"
-    ngx_feature_run=no
-    ngx_feature_incs="#include <openssl/ssl.h>"
-    ngx_feature_path=
-    ngx_feature_libs="-lssl -lcrypto $NGX_LIBDL $NGX_LIBPTHREAD"
-    ngx_feature_test="SSL_set_quic_early_data_context(NULL, NULL, 0)"
-    . auto/feature
 fi

src/event/quic/ngx_event_quic_ssl.c

@@ -549,7 +549,7 @@ ngx_quic_init_connection(ngx_connection_t *c)
         return NGX_ERROR;
     }
 
-#if (NGX_OPENSSL_QUIC_ZRTT_CTX)
+#if BORINGSSL_API_VERSION >= 11
     if (SSL_set_quic_early_data_context(ssl_conn, p, clen) == 0) {
         ngx_log_error(NGX_LOG_INFO, c->log, 0,
                       "quic SSL_set_quic_early_data_context() failed");