/* Convert r=TAG to t=TAG&rel. */
  if( zBrName && !related ){
    cgi_delete_query_parameter("r");
    cgi_set_query_parameter("t", zBrName);
    cgi_set_query_parameter("rel", "1");
    zTagName = zBrName;
    related = 1;
    zType = "ci";
  }

  /* Ignore empty tag query strings. */
  if( zTagName && !*zTagName ){
    zTagName = 0;
  }

  /* Finish preliminary processing of tag match queries. */
  if( zTagName ){
    zType = "ci";
    /* Interpet the tag style string. */
    if( fossil_stricmp(zMatchStyle, "glob")==0 ){
      matchStyle = MS_GLOB;
    }else if( fossil_stricmp(zMatchStyle, "like")==0 ){
      matchStyle = MS_LIKE;
    }else if( fossil_stricmp(zMatchStyle, "regexp")==0 ){
      matchStyle = MS_REGEXP;