reorganize ssl config ; default proxy config

snippets/ssl.conf

@@ -0,0 +1,14 @@
+ssl_certificate_by_lua_block {
+      auto_ssl:ssl_certificate()
+}
+
+    # You must still define a static ssl_certificate file for nginx to start.
+    #
+    # You may generate a self-signed fallback with:
+    #
+    # openssl req -new -newkey rsa:2048 -days 3650 -nodes -x509 \
+    #   -subj '/CN=sni-support-required-for-valid-ssl' \
+    #   -keyout /etc/ssl/resty-auto-ssl-fallback.key \
+    #   -out /etc/ssl/resty-auto-ssl-fallback.crt
+ssl_certificate /etc/ssl/resty-auto-ssl-fallback.crt;
+ssl_certificate_key /etc/ssl/resty-auto-ssl-fallback.key;