Plumb out ownership a bit.

src/url.cc

@@ -134,7 +134,7 @@ const char *a_Url_hostname(const DilloUrl *u)
  *  Create a DilloUrl object and initialize it.
  *  (buffer, scheme, authority, path, query and fragment).
  */
-static DilloUrl *Url_object_new(const char *uri_str)
+static std::unique_ptr< DilloUrl > Url_object_new(const char *uri_str)
 {
    char *s, *p;
 
@@ -170,7 +170,7 @@ static DilloUrl *Url_object_new(const char *uri_str)
          s = p;
       } else if (*s) {
          url->authority = s;
-         return url.release();
+         return url;
       }
    }
 
@@ -180,7 +180,7 @@ static DilloUrl *Url_object_new(const char *uri_str)
       s = p;
    } else if (*s) {
       url->path = s;
-      return url.release();
+      return url;
    }
 
    p = strpbrk(s, "?#");
@@ -197,7 +197,7 @@ static DilloUrl *Url_object_new(const char *uri_str)
       url->fragment = s;
    }
 
-   return url.release();
+   return url;
 }
 
 /**
@@ -228,7 +228,7 @@ static std::string Url_resolve_relative(const char *RelStr,
 
    if (RelUrl->scheme == NULL) {
       /* only required when there's no <scheme> in RelStr */
-      BaseUrl.reset( Url_object_new(BaseStr) );
+      BaseUrl= Url_object_new(BaseStr);
    }
 
    /* path empty && scheme and authority undefined */
@@ -360,7 +360,7 @@ static std::string Url_resolve_relative(const char *RelStr,
  */
 DilloUrl* a_Url_new(const char *url_str, const char *base_url)
 {
-   DilloUrl *url;
+   std::unique_ptr< DilloUrl > url;
    char *urlstr = (char *)url_str;  /* auxiliary variable, don't free */
    char *p, *str1 = NULL, *str2 = NULL;
    std::string SolvedUrl;
@@ -429,7 +429,7 @@ DilloUrl* a_Url_new(const char *url_str, const char *base_url)
        * URLs like "http://en.wikipedia.org:80" to "https://en.wikipedia.org:443".
        */
       if (prefs.http_strict_transport_security &&
-          a_Hsts_require_https(a_Url_hostname(url))) {
+          a_Hsts_require_https(a_Url_hostname(url.get()))) {
          _MSG("url: HSTS transformation for %s.\n", url->url_string->str);
          switch_to_https = TRUE;
       } else if (prefs.http_force_https) {
@@ -456,7 +456,7 @@ DilloUrl* a_Url_new(const char *url_str, const char *base_url)
       url->url_string.reset();
    }
 
-   return url;
+   return url.release();
 }
 
 
@@ -465,9 +465,7 @@ DilloUrl* a_Url_new(const char *url_str, const char *base_url)
  */
 DilloUrl* a_Url_dup(const DilloUrl *ori)
 {
-   DilloUrl *url;
-
-   url = Url_object_new(URL_STR_(ori));
+   auto url = Url_object_new(URL_STR_(ori));
    dReturn_val_if_fail (url != NULL, NULL);
 
    url->url_string           = URL_STR(ori);
@@ -477,7 +475,7 @@ DilloUrl* a_Url_dup(const DilloUrl *ori)
    url->illegal_chars        = ori->illegal_chars;
    url->illegal_chars_spc    = ori->illegal_chars_spc;
    url->data                 = ori->data;
-   return url;
+   return url.release();
 }
 
 /**