httpsrr: send HTTPS query to the right target

When the target host is on a different port than 443, the name
"_[port]._https.[name]" shall be used.

Fixes #19301
Reported-by: Gunni on github
Closes #19324

lib/httpsrr.c

@@ -152,6 +152,7 @@ void Curl_httpsrr_cleanup(struct Curl_https_rrinfo *rrinfo)
   Curl_safefree(rrinfo->echconfiglist);
   Curl_safefree(rrinfo->ipv4hints);
   Curl_safefree(rrinfo->ipv6hints);
+  Curl_safefree(rrinfo->rrname);
 }
 
 
@@ -206,6 +207,7 @@ CURLcode Curl_httpsrr_from_ares(struct Curl_easy *data,
     }
   }
 out:
+  Curl_safefree(hinfo->rrname);
   return result;
 }