Remove the inappropriate flag conflict

There is no reasons why any current log system would be inaccessible
when running either in the background or the foreground.

acmed/src/main.rs

@@ -62,7 +62,6 @@ fn main() {
                 .short("f")
                 .long("foregroung")
                 .help("Runs in the foregroung")
-                .conflicts_with("to-stderr"),
         )
         .arg(
             Arg::with_name("pid-file")