Add detection for webdev (#2351)

Webdev is a infamous french software to develop websites known for its
[sexist](http://blog.clement.delafargue.name/posts/2014-05-01-youve-convinced-me-boss-ill-work-with-windev-and-pc-soft.html)
[as](https://www.theregister.co.uk/2014/05/02/french_software_developers_are_all_beautiful_women/)
[fuck](http://www.mhfreq.org/2013/12/les-pubs-windev/)
[ads](https://www.windev.com/newfeatures23/ebook/index.html) and for using
French keywords everywhere.

It's [kinda popular](https://www.pcsoft.fr/webdev/listesite.htm) and used for
some big corporate website and ERP.