Add freegenerator, domainstat and crawldbscanner to log4j

Index: conf/log4j.properties
===================================================================
--- conf/log4j.properties       (revision 1221184)
+++ conf/log4j.properties       (working copy)
@@ -32,6 +32,9 @@
 log4j.logger.org.apache.nutch.scoring.webgraph.ScoreUpdater=INFO,cmdstdout
 log4j.logger.org.apache.nutch.parse.ParserChecker=INFO,cmdstdout
 log4j.logger.org.apache.nutch.indexer.IndexingFiltersChecker=INFO,cmdstdout
+log4j.logger.org.apache.nutch.tools.FreeGenerator=INFO,cmdstdout
+log4j.logger.org.apache.nutch.util.domain.DomainStatistics=INFO,cmdstdout
+log4j.logger.org.apache.nutch.tools.CrawlDBScanner=INFO,cmdstdout
 
 log4j.logger.org.apache.nutch=INFO
 log4j.logger.org.apache.hadoop=WARN