Adding default port value if not provided.

Rather than throwing error for invalid host address due to missing port,
default port is inserted at the end and validity is checked again.

src/installer/step/mod.rs

@@ -339,6 +339,17 @@ impl Step for DefineCoordinator {
 
         self.host.valid = SocketAddr::from_str(&self.host.value).is_ok();
 
+        if !self.host.valid {
+            // trim spaces at the end if any.
+            let clean_value = self.host.value.trim_end();
+
+            let value = format!("{}:8383", clean_value).to_string();
+            self.host.valid = SocketAddr::from_str(&value).is_ok();
+            if self.host.valid {
+                self.host.value = value;
+            }
+        }
+
         if !self.host.valid || !self.noise_key.valid {
             return false;
         }