old_contents: from django.conf.urls import patterns, url
  from .views import block_view, unblock_ip_view, unblock_username_view
  
  urlpatterns = patterns(
      '',
      url(r'^blocks/$', block_view,
          name="defender_blocks_view"),
      url(r'^blocks/ip/(?P<ip_address>[a-z0-9-._]+)/unblock$', unblock_ip_view,
          name="defender_unblock_ip_view"),
      url(r'^blocks/username/(?P<username>[a-z0-9-._@]+)/unblock$',
          unblock_username_view,
          name="defender_unblock_username_view"),
  )
  
new_contents: from django.conf.urls import patterns, url
  from .views import block_view, unblock_ip_view, unblock_username_view
  
  urlpatterns = patterns(
      '',
      url(r'^blocks/$', block_view,
          name="defender_blocks_view"),
      url(r'^blocks/ip/(?P<ip_address>[A-Za-z0-9-._]+)/unblock$', unblock_ip_view,
          name="defender_unblock_ip_view"),
      url(r'^blocks/username/(?P<username>[A-Za-z0-9-._@]+)/unblock$',
          unblock_username_view,
          name="defender_unblock_username_view"),
  )
  
subject: Fix for usernames with capital letters