Add a note about CONFIG_AUDITSYSCALL and PAM

Thanks to Samuli Suominen for pointing this out.
Default to not building systemd units
Don't tie the inhibit locks to the who string

This allows for multiple instances of the same app to hold a lock
should they need to.
trivial: updates for release
Fix installing logrotate file

This ensures the logrotate file will rotate the history file correctly.
It also now installs to the right location.
Conditionally add the SystemdService

Add the SystemdService service tag to the consolekit service file
if we're being built with systemd support.
Fix installing 90-consolekit file

This ensures the 90-consolekit file will be installed to the
right location.