message: fix: Don't ignore dest look-alikes
  With the current setup, any directory path that looked like dest,
  relative to source, would be ignored.  Now only the actual dest is being
  ignored.
diff: @@ -261,7 +261,7 @@ impl ConfigBuilder {
  if let Ok(rel_dest) = path::Path::new(&destination).strip_prefix(&source) {
  let rel_dest = rel_dest.to_str().expect("started as a utf-8 string");
  if !rel_dest.is_empty() {
  - ignore.push(rel_dest.to_owned());
  + ignore.push(format!("/{}", rel_dest.to_owned()));
  }
  }
  @@ -454,7 +454,7 @@ fn test_build_dest() {
  .set_post(true),
  ..Default::default()
  },
  - ignore: ["dest".to_owned()].to_vec(),
  + ignore: ["/dest".to_owned()].to_vec(),
  ..Default::default()
  });
  }
  @@ -477,7 +477,7 @@ fn test_build_abs_dest() {
  .set_post(true),
  ..Default::default()
  },
  - ignore: ["dest".to_owned()].to_vec(),
  + ignore: ["/dest".to_owned()].to_vec(),
  ..Default::default()
  });
  }
  