pull up r20022 from trunk

pull up r20022 from trunk

 r20022@cathode-dark-space:  jaltman | 2007-09-30 00:44:31 -0400
 ticket: 5753

 Remove Krb5Cred, Krb5Ident, and Krb4Cred default configuration data from
 the KMM Schema.  Require that modules that are installed be properly
 installed.

 Add NIM Module Registry values to the NSIS installer.  These values were
 already being set by the Wix installer.

 By removing the ImagePath default, unable to load module errors will
 not be generated when the module has not in fact been installed.

ticket: 5753

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-6@20062 dc483132-0cff-0310-8789-dd5450dbe970