** "sync", "push", or "pull" command that specifies an explicit URL.
** The default remote-url is used by auto-syncing and by "sync", "push",
** "pull" that omit the server URL.
*/
void remote_url_cmd(void){
  char *zUrl;
  int showPw = find_option("show-pw",0,0)!=0;
  db_must_be_within_tree();
  db_find_and_open_repository(1);
  if( g.argc!=2 && g.argc!=3 ){
    usage("remote-url ?URL|off?");
  }
  if( g.argc==3 ){
    if( strcmp(g.argv[2],"off")==0 ){
      db_unset("last-sync-url", 0);
    }else{