Improve logging modules and listing #984

Do not support JCL as a logging mechanism.  Only support jcl-slf4j binding

jetty-util/src/main/config/modules/jcl-simple-impl.mod

@@ -1,32 +0,0 @@
-[description]
-Provides a Java Commons Logging implementation.  
-To receive jetty logs the jetty-slf4j and slf4j-jcl must also be enabled.
-
-[tags]
-logging
-jcl
-internal
-
-[depends]
-resources
-console-capture
-
-[provides]
-jcl-api
-jcl-impl
-
-[files]
-maven://commons-logging/commons-logging/${jcl.version}|lib/jcl/commons-logging-${jcl.version}.jar
-basehome:modules/jcl/commons-logging.properties|resources/commons-logging.properties
-logs/
-
-[lib]
-lib/jcl/*.jar
-
-[license]
-Log4j is released under the Apache 2.0 license.
-http://www.apache.org/licenses/LICENSE-2.0.html
-
-[ini]
-jcl.version=1.1.3
-

jetty-util/src/main/config/modules/logging-jcl.mod

@@ -1,19 +0,0 @@
-[description]
-Configure jetty logging to use Java Commons Logging (jcl)
-SLF4J is used as the core logging mechanism.
-
-[tags]
-logging
-
-[depends]
-slf4j-jcl
-jcl-impl
-
-[provides]
-logging
-
-[exec]
--Dorg.eclipse.jetty.util.log.class=org.eclipse.jetty.util.log.Slf4jLog
-
-[ini]
-jetty.webapp.addServerClasses+=,file:${jetty.base}/lib/slf4j/,file:${jetty.base}/lib/jul/

jetty-util/src/main/config/modules/slf4j-jcl.mod

@@ -1,22 +0,0 @@
-[description]
-Provides a SLF4J binding to Java Commons Logging (JCL) logging.
-
-[tags]
-logging
-jcl
-slf4j
-internal
-
-[depends]
-slf4j-api
-jcl-impl
-
-[provides]
-slf4j-impl
-slf4j+jcl
-
-[files]
-maven://org.slf4j/slf4j-jcl/${slf4j.version}|lib/slf4j/slf4j-jcl-${slf4j.version}.jar
-
-[lib]
-lib/slf4j/slf4j-jcl-${slf4j.version}.jar