h2o: fix compilation without engine support

Signed-off-by: Rosen Penev <rosenp@gmail.com>

libs/h2o/Makefile

@@ -2,7 +2,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=h2o
 PKG_VERSION:=2.2.6
-PKG_RELEASE:=4
+PKG_RELEASE:=5
 
 PKG_SOURCE_URL:=https://codeload.github.com/h2o/h2o/tar.gz/v${PKG_VERSION}?
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz

libs/h2o/patches/600-engine.patch

@@ -0,0 +1,28 @@
+--- a/deps/neverbleed/neverbleed.c
++++ b/deps/neverbleed/neverbleed.c
+@@ -1486,6 +1486,7 @@ int neverbleed_init(neverbleed_t *nb, char *errbuf)
+     close(pipe_fds[0]);
+     pipe_fds[0] = -1;
+ 
++#ifndef OPENSSL_NO_ENGINE
+     /* setup engine */
+     if ((nb->engine = ENGINE_new()) == NULL || !ENGINE_set_id(nb->engine, "neverbleed") ||
+         !ENGINE_set_name(nb->engine, "privilege separation software engine") || !ENGINE_set_RSA(nb->engine, rsa_method)
+@@ -1497,6 +1498,7 @@ int neverbleed_init(neverbleed_t *nb, char *errbuf)
+         goto Fail;
+     }
+     ENGINE_add(nb->engine);
++#endif
+ 
+     /* setup thread key */
+     pthread_key_create(&nb->thread_key, dispose_thread_data);
+@@ -1515,7 +1517,9 @@ Fail:
+     if (listen_fd != -1)
+         close(listen_fd);
+     if (nb->engine != NULL) {
++#ifndef OPENSSL_NO_ENGINE
+         ENGINE_free(nb->engine);
++#endif
+         nb->engine = NULL;
+     }
+     return -1;