winhlp32: Restore the original window proc for the richedit control before freeing the winhelp window memory.

msi: Improve stub for MsiGetFeatureCost{A, W} and hook the stub into the VolumeCostList dialog control.

Also remove extraneous semi-colons.

secur32: Output extra data in NTLM sign & seal test to diagnose failures seen on some Windows machines.

This reverts 60770fb0, although it
updates the comments to give a reason.  Thanks to Matt Van Gundy for
pointing it out to me.