REVIEW: terse logging for EOFException unless debug is enabled

```
2013-11-08 11:45:43 WARN  [qtp1211980116-3629] <unknown-user> org.restlet.Component.Server - An exception occured writing the response entity: null
org.eclipse.jetty.io.EofException: null
at org.eclipse.jetty.http.HttpGenerator.flushBuffer(HttpGenerator.java:914) ~[jetty-http-8.1.11.v20130520.jar:8.1.11.v20130520]
at org.eclipse.jetty.http.AbstractGenerator.blockForOutput(AbstractGenerator.java:523) ~[jetty-http-8.1.11.v20130520.jar:8.1.11.v20130520]
at org.eclipse.jetty.server.HttpOutput.write(HttpOutput.java:170) ~[jetty-server-8.1.11.v20130520.jar:8.1.11.v20130520]
at org.eclipse.jetty.server.HttpOutput.write(HttpOutput.java:107) ~[jetty-server-8.1.11.v20130520.jar:8.1.11.v20130520]
at org.codehaus.plexus.util.IOUtil.copy(IOUtil.java:191) ~[plexus-utils-3.0.10.jar:na]
at org.codehaus.plexus.util.IOUtil.copy(IOUtil.java:175) ~[plexus-utils-3.0.10.jar:na]
at org.sonatype.nexus.rest.StaticResourceRepresentation.write(StaticResourceRepresentation.java:52) ~[nexus-restlet1x-plugin-2.7.0-01.jar:2.7.0-01]
at com.noelios.restlet.http.HttpServerCall.writeResponseBody(HttpServerCall.java:492) ~[com.noelios.restlet-1.1.6-SONATYPE-5348-V8.jar:na]
at com.noelios.restlet.http.HttpServerCall.sendResponse(HttpServerCall.java:428) ~[com.noelios.restlet-1.1.6-SONATYPE-5348-V8.jar:na]
at com.noelios.restlet.ext.servlet.ServletCall.sendResponse(ServletCall.java:421) ~[com.noelios.restlet.ext.servlet-1.1.6-SONATYPE-5348-V8.jar:na]
at com.noelios.restlet.http.HttpServerConverter.commit(HttpServerConverter.java:391) ~[com.noelios.restlet-1.1.6-SONATYPE-5348-V8.jar:na]
at com.noelios.restlet.http.HttpServerHelper.handle(HttpServerHelper.java:148) [com.noelios.restlet-1.1.6-SONATYPE-5348-V8.jar:na]
at com.noelios.restlet.ext.servlet.ServerServlet.service(ServerServlet.java:881) [com.noelios.restlet.ext.servlet-1.1.6-SONATYPE-5348-V8.jar:na]
at org.sonatype.nexus.web.NexusRestletServlet.service(NexusRestletServlet.java:92) [nexus-restlet1x-plugin-2.7.0-01.jar:2.7.0-01]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:848) [javax.servlet-3.0.0.v201112011016.jar:na]
...
```