[Exist-development] Added the option of checking server name for URL rewriting

[Loren C. <lor...@gm...>]

There is an option (off of trunk version 11177) now to send web queries to different collections within eXist based on the server name in the URL:

i.e.
With the following configuration changes in controller-config.xml

from:
    <root pattern=".*" path="/"/>

to:
    <root server-name="site1.example.com" pattern="/*" path="xmldb:exist:///db/org/site1/"/>
    <root server-name="site2.example.com" pattern="/*" path="xmldb:exist:///db/org/site2/"/>
    <root server-name="site3.example.com" pattern="/*" path="xmldb:exist:///db/org/site3/"/>
    <root server-name="localhost" pattern=".*" path="/"/>
    <root server-name="site4.example.com" pattern=".*" path="/"/>

http://site1.example.com/ would be redirected to /db/org/site1
http://site2.example.com/ would be redirected to /db/org/site2
http://site3.example.com/ would be redirected to /db/org/site3
http://localhost/ would be directed to index.xml in the webapp directory as it is normally done.
http://site4.example.com/ would be directed to index.xml

NOTE: The server-name attribute is optional.  If it is omitted, then the behavior operates as normal.

This will allow for the hosting of multiple websites in one eXist instance.  

I still need to work on the jetty configuration, so that the logs for each individual website can be separated out from the other websites.