Previously, it was -
Doorway pages are pages specifically made for search engines. Doorway pages contain many links - often several hundred - that are of little to no use to the visitor, and do not contain valuable content. HTML sitemaps are a valuable resource for your visitors, but ensure that these pages of links are easy for your visitors to navigate. If you have a number of links to include, consider organizing them into categories or into multiple pages. But in doing so, ensure that they are intended for visitors to navigate the sections of your site, and not simply for search engines."
And now it has changed to -
"Doorway pages are typically large sets of poor-quality pages where each page is optimized for a specific keyword or phrase. In many cases, doorway pages are written to rank for a particular phrase and then funnel users to a single destination."
So, Google is like changing many things now, like in the last month, we have seen G changes its favicon (but just favicon); even that's not a big change - but yeah! change is there. Lets see if some more changes are there or not?