Include square brackets and port number in calcs for max_dl_per_request

max_dl_per_request(const or_options_t *options, int purpose)

{

  /* Since squid does not like URLs >= 4096 bytes we limit it to 96.

   *   4096 - strlen(http://ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff

   *                 /tor/server/d/.z) == 4034

   *   4034/41 (40 for the hash and 1 for the + that separates them) => 98

   *   4096 - strlen(http://[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]:65535

   *                 /tor/server/d/.z) == 4026

   *   4026/41 (40 for the hash and 1 for the + that separates them) => 98

   *   So use 96 because it's a nice number.

   *

   * For microdescriptors, the calculation is

   *   4096 - strlen(http://ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff

   *                 /tor/micro/d/.z) == 4035

   *   4035/44 (43 for the hash and 1 for the - that separates them) => 91

   *   4096 - strlen(http://[ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff]:65535

   *                 /tor/micro/d/.z) == 4027

   *   4027/44 (43 for the hash and 1 for the - that separates them) => 91

   *   So use 90 because it's a nice number.

   */

  int max = 96;