Land rapid7#3409, fix for http crawler

Author: firefart

modules/auxiliary/scanner/http/crawler.rb

@@ -104,8 +104,8 @@ def crawler_process_page(t, page, cnt)
       info[:ctype] = page.headers['content-type']
     end
 
-    if !page.get_cookies.empty?
-      info[:cookie] = page.get_cookies
+    if !page.cookies.empty?
+      info[:cookie] = page.cookies
     end
 
     if page.headers['authorization']