Add option 'exact match' on mounts

[jgou]

It might be useful to have an option to turn on exact matching on the mounts in kauri.xml .
When mounting e.g. a index page on "", every uri that is not matched by another mount will return this index page. I think that this is not always the wanted behaviour.

Low priority: when simple mounting isn't enough, you can use the kauri routing module.

[mpo]

unsure what this is about, wasn't closed for 0.3 so I guess it is still a valid enhancement request

unsure though if this isn't on a restlet level, or just a matter of documentation

please conclude what to do about is during 0.4

[mpo]

The routing module offers quite some flexibility for controlling the match. Although theoretically true we're not seeing immediate needs for equal flexibility on the mount paths in the wiring.xml
(note/reminder: kauri.xml has moved to conf/wiring.xml)

Leaving the case open for now so people can add their arguments/use cases here.

(settling for labeling this as beyond 0.4 scope)