[Lift] 2.0-M3 & SLF4J Logging

[aw]

I just upgraded my code to M3 and also replaced my LOGGERs with the
new Loggable trait.  I am using LogBack (not Log4j).

I thought that with 2.0-M3, the following call would be deprecated and
no longer necessary:  Slf4jLogBoot.enable()
Alas, I discovered that it is still mandatory, otherwise I get a
NoClassDefFound exception for org.apache.log4j.Priority.
I thought SLF4J was enabled already, so I don't know why I need to
explicitly enable it.

Secondly, if you read the Wiki:  
http://wiki.github.com/dpp/liftweb/logging-in-lift
It says to exclude org.slf4j:slf4j-log4j12 from lift-mapper.
But I noticed that it is lift-webkit that has the dependency
(transitively from net.liftweb:lift-util) that needs to be excluded.
As a result, I have this instead:

        <dependency>
            <groupId>net.liftweb</groupId>
            <artifactId>lift-webkit</artifactId>
            <version>2.0-M3</version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>slf4j-log4j12</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

I recommend updating the wiki entry.

Thanks!

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