pull up r19430 from trunk

pull up r19430 from trunk

 r19430@cathode-dark-space:  kpkoch | 2007-04-12 10:29:07 -0400
 Target_Version: 1.6.1
 Ticket: 5521
 Tags: pullup

 KfW build automation:

 Consolidate all command line switch info in one section of the config.xml, flatten structure.
 Don't prune .../site/... .
 Use getopts negate option where possible.
 New method of dealing with repository options, driven from config xml.
 Adjust code to find switches in new place.

 Hardwire default config to bkwconfig.xml.  Makes "bkw.pl" the out-of-the-box command line.
 Hardwire unixfind path to C:\tools\cygwin\bin.
 Add filver to required programs list.

 Update documentation.

ticket: 5521

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-6@19494 dc483132-0cff-0310-8789-dd5450dbe970