URL field too short

Issue Summary

URLs can only have a maximum of 64 characters. This is to short for many URLs.

The German newspaper FAZ for example has URLs like this:
http://www.faz.net/s/RubDDBDABB9457A437BAA85A49C26FB23A0/Doc~EEC2C353D05...

But already an example like this is one character too long:
http://www.upgrade-cepis.org/issues/2006/6/upgrade-vol-VII-6.html

The reason is the definition of the form field in weblinks.module line 355-361:

$form['url'] = array('#type' => 'textfield',<br>
    '#title' => t('URL'),<br>
    '#default_value' => $node->url,<br>
    '#maxlength' =>  64,<br>
    '#description' => t('The description can provide additional information about the link.'),<br>
    '#required' => TRUE,<br>
  );

The database field has the type of varchar(155). So the form field should also have a maxlength of 155.

In my opinion 155 characters is still too short. I'd prefer varchar(255) for storing URLs or the text type where string length doesn't matter.