pull up r19521 from trunk

pull up r19521 from trunk

 r19521@cathode-dark-space:  kpkoch | 2007-04-23 11:54:19 -0400
 Ticket: new
 Subject: Optimize file/directory pruning
 Target_Version: 1.6.1
 Not tagged yet so it can be evaluated first.

 Consolidate find and rm operations in prunefiles.pl as suggested by Ken.

 Remove pruning of SDK files.  This hasn't been needed since the installer builds moved from staging to temp directories.

 Remove debug statement not cleaned up previously.

 Add a troubleshooting tip to the doc.

ticket: 5542
version_fixed: 1.6.3

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-6@19800 dc483132-0cff-0310-8789-dd5450dbe970