lighttpd: lighttpd.conf enable flag for HTTP/2

lighttpd.conf reference server.feature-flags

Signed-off-by: Glenn Strauss <gstrauss@gluelogic.com>

net/lighttpd/files/lighttpd.conf

@@ -11,6 +11,13 @@ index-file.names            = ( "index.php", "index.html",
 
 static-file.exclude-extensions = ( ".php", ".pl", ".fcgi" )
 
+### Features
+#https://redmine.lighttpd.net/projects/lighttpd/wiki/Server_feature-flagsDetails
+server.feature-flags       += ("server.h2proto" => "enable")
+server.feature-flags       += ("server.h2c"     => "enable")
+server.feature-flags       += ("server.graceful-shutdown-timeout" => 5)
+#server.feature-flags       += ("server.graceful-restart-bg" => "enable")
+
 ### Options that are useful but not always necessary:
 #server.chroot               = "/"
 #server.port                 = 81