pull up r20211 from trunk

pull up r20211 from trunk

 r20211@cathode-dark-space:  jaltman | 2008-01-23 17:10:56 -0500
 ticket: new
 subject: Windows: avoid use of cygwin mkdir and rmdir commands
 tags: pullup

 Microsoft's nmake versions 8.x and 9.x prefer executables over
 internal shell commands.  This is a change from previous versions.
 Cygwin's mkdir and rmdir commands do not have the same semantics
 as the cmd.exe shell versions.

 Change the definitions of MKDIR and RMDIR to use 'md' and 'rd'
 in order to avoid the use of the cygwin versions.

ticket: 5875
target_version: 1.6.4
version_fixed: 1.6.4
component: windows

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-6@20232 dc483132-0cff-0310-8789-dd5450dbe970