which search the logdir instead of the tapelist
* perl/Amanda/Logfile.pod: documentation
* server-src/amreport.pl: use find_latest_log insted of find_log



git-svn-id: https://amanda.svn.sourceforge.net/svnroot/amanda/amanda/branches/3_1@2861 a8d146d6-cc15-0410-8900-af154a0219e0