++skin++ namespace traversal broken

[yuppie]

This mail describes how the ++skin++ namespace should be used (I couldn't find a newer description):
https://mail.zope.org/pipermail/zope3-dev/2003-August/008188.html

In Zope 2 the URLs returned by methods like absolute_url() don't contain the /++skin++foo/ part of the current request. So with any link or redirect we loose the skin.

The problem is caused by ZPublisher.HTTPRequest.HTTPRequest.shiftNameToApplication: That method doesn't contain any code. Porting the implementation from zope.publisher to ZPublisher seems to fix this issue.

[yuppie (yuppie3)]

http://svn.zope.org/?rev=124415&view=rev
http://svn.zope.org/?rev=124416&view=rev