Change the signature of ap_url to be backward-compatible

plume-models/src/lib.rs

@@ -92,7 +92,7 @@ lazy_static! {
     pub static ref USE_HTTPS: bool = env::var("USE_HTTPS").map(|val| val == "1").unwrap_or(true);
 }
 
-pub fn ap_url(url: &str) -> String {
+pub fn ap_url(url: String) -> String {
     let scheme = if *USE_HTTPS {
         "https"
     } else {