Windows NetIDMgr post-1.5 branch commits

Windows NetIDMgr post-1.5 branch commits

The following patch updates the NetIDMgr:

 * allow plug-ins to be marked "do not unload" in order
   to support DLLs that create threads that are not
   properly cleaned up as part of library unload.

 * allow plug-ins to be marked "disabled"

 * Additional changes to deal with Microsoft's efforts
   to deprecate all of the str C runtime functions.

 * Improvements to Manifest processing in the build
   system

 * Addition of Tooltip support to the Toolbar.  Dragging
   the mouse over toolbar buttons displays textual
   descriptions.

 * Correct the behavior of the New Credentials Dialog
   to disable the "Ok" button after it has been pressed.

 * Add support to allow plugin configuration data to
   be distributed as part of transforms to the MSI
   installer.

ticket: new

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@18344 dc483132-0cff-0310-8789-dd5450dbe970