Disable ssl when -D without_openssl is given

src/kemal.cr

@@ -12,7 +12,9 @@ module Kemal
     config.add_handler Kemal::RouteHandler::INSTANCE
 
     config.server = HTTP::Server.new(config.host_binding, config.port, config.handlers)
+    {% if ! flag?(:without_openssl) %}
     config.server.tls = config.ssl
+    {% end %}
 
     Kemal::Sessions.run_reaper!
 

src/kemal/cli.cr

@@ -39,6 +39,7 @@ module Kemal
     end
 
     def configure_ssl
+    {% if ! flag?(:without_openssl) %}
       if @ssl_enabled
         puts "SSL Key Not Found"; exit unless @key_file
         puts "SSL Certificate Not Found"; exit unless @cert_file
@@ -47,6 +48,7 @@ module Kemal
         ssl.set_cert_file @cert_file.not_nil!
         Kemal.config.ssl = ssl.context
       end
+    {% end %}
     end
 
     def read_env

src/kemal/config.cr

@@ -8,7 +8,11 @@ module Kemal
     INSTANCE       = Config.new
     HANDLERS       = [] of HTTP::Handler
     ERROR_HANDLERS = {} of Int32 => HTTP::Server::Context -> String
+    {% if flag?(:without_openssl) %}
+    @ssl : Bool?
+    {% else %}
     @ssl : OpenSSL::SSL::Context::Server?
+    {% end %}
 
     property host_binding, ssl, port, env, public_folder, logging,
       always_rescue, serve_static, server, extra_options