4.4.0

• custom etag control with app.set('etag', val)
  • app.set('etag', function(body, encoding){ return '"etag"' }) custom etag generation
  • app.set('etag', 'weak') weak tag
  • app.set('etag', 'strong') strong etag
  • app.set('etag', false) turn off
  • app.set('etag', true) standard etag
• mark res.send ETag as weak and reduce collisions
• update accepts to 1.0.2
  • Fix interpretation when header not in request
• update send to 0.4.0
  • Calculate ETag with md5 for reduced collisions
  • Ignore stream errors after request ends
  • deps: debug@0.8.1
• update serve-static to 1.2.0
  • Calculate ETag with md5 for reduced collisions
  • Ignore stream errors after request ends
  • deps: send@0.4.0