[Incubator] Welcome pages and info pages at Incubator

[Robin Pepermans]

Hello,

There is a lot of stuff in development for the Wikimedia Incubator,
and I would like to get a part of it enabled on Wikimedia Incubator
soon, specifically the info pages or welcome pages ("Wx/xx(x)" pages).

For example < http://robinpepermans.be/mw-dev/index.php?title=Wn/es >
gives a nice welcome page that refers you to the existing wiki. Pages
like < http://robinpepermans.be/mw-dev/index.php?title=Wn/es/Page >
refer you to the existing wiki as well. It is not possible to edit
pages belonging to existing wikis.

Non-existing wikis also have a welcome page:
http://robinpepermans.be/mw-dev/index.php?title=Wb/xmf

It directly depends on the list with databases, so at the exact moment
a wiki is created, it will no longer be possible to edit Incubator
pages of that project (which facilitates importing pages to a new
wiki).

Another feature is that <
http://robinpepermans.be/mw-dev/index.php?title=Wn/es&goto=mainpage >
will refer you directly to the existing wiki.

What is not yet included (coming later):
* A check for the validity of the language code
* Alternative codes like bat-smg / sgs => Wp/bat-smg will refer you to
the wiki, while Wp/sgs will say it doesn't exist yet
* Welcome pages for Wikiversity and Wikisource that refer you to the
respective wikis
* Possibility to use the template for test wikis that are actually on Incubator

Any suggestions, ideas, comments, bug reports, etc. are certainly welcome!

Regards,
SPQRobin