Fix output methods that take configurations.

The falco engine changes broke the output methods that take
configuration (like the filename for file output, or the program for
program output). Fix that by properly passing the options argument to
each method's output function.

userspace/falco/lua/output.lua

@@ -23,17 +23,17 @@ function mod.file_validate(options)
 
 end
 
-function mod.file(level, msg)
+function mod.file(level, msg, options)
    file = io.open(options.filename, "a+")
    file:write(msg, "\n")
    file:close()
 end
 
-function mod.syslog(level, msg)
+function mod.syslog(level, msg, options)
    falco.syslog(level, msg)
 end
 
-function mod.program(level, msg)
+function mod.program(level, msg, options)
    -- XXX Ideally we'd check that the program ran
    -- successfully. However, the luajit we're using returns true even
    -- when the shell can't run the program.
@@ -61,7 +61,7 @@ function output_event(event, rule, priority, format)
    msg = falco.format_event(event, rule, levels[level+1], formatter)
 
    for index,o in ipairs(outputs) do
-      o.output(level, msg)
+      o.output(level, msg, o.config)
    end
 
    falco.free_formatter(formatter)