URLrewriter: improve interface add low-tech option without regular expressions

Urlrewriter: It would be nice if there was an easy way for the customer to specify the condition "if host equals" (perhaps allow the From field to be fully qualified?)

Usecase1:
From:
http://www.angola.embaixadaholanda.org (external site)
to
http://www.minbuza.nl/reizen-en-landen/overview/a/angola.html

Usecase2:
From:
http://www.minbuza.nl/angolaspecial (own site) or /angolaspecial
To:
http://www.minbuza.nl/reizen-en-landen/overview/a/angola.html

When this is done, Hendrik and Bartosz will make kickass documentation

DOCUMENTATION SANDBOX:
https://wiki.onehippo.com/display/HIPPO/Sandbox+-+Hippo+URL+rewriter+plugin+documentation