user-docs: issues with some pages

[Michael Hill <mdhillca gmail com>]

I've reviewed the pages below for 3.2 but didn't get the expected
behaviour, so would appreciate somone confirming them.

session-fingerprint - I am unable to test fingerprint procedure to
verify instructions

user-changepassword - no automatic prompt for keyring password on next
login after changing regular password, in opensuse or fedora; line
commented out

windows-key - added procedure for changing keybinding but left it
commented out because change is not allowed for me in opensuse or
fedora

shell-keyboard-shortcuts - Ctrl-Alt-D commented out; doesn't work for
me in opensuse or fedora

Mike