SVN integration with Bugzilla or JIRA

[Curt Arnold]

What are the supported or available integration options between SVN  
and Bugzilla or JIRA?  It may be desirable to migrate the log4j bug  
database to JIRA at the same time that the source code repositories  
are migrated to SVN, particularly if SVN/JIRA integration is better  
in some sense than the SVN/Bugzilla integration.