Implements utmp audit required by policykit.
This commit also flattens the pidtree for the DM by starting the
display environment directly in the first fork which already should
have the environment ready for this purpose. This is with the
exception of xorg environments where this can't be done that easily.
* remove trailing whitespace
* always submit password on enter
Moves the keypress logic for keypresses from if-else statements
to switches, adds non-contextual behavior on pressing enter
* wrap pam actions and handle errors at on spot
* init all of text struct in input_text()
This gets rid off valgrind warning on unitialized variables
Stanislav Láznička