In the troff output, this doesn't seem to make any difference. But in the
html output, the whitespace is sometimes preserved, creating an additional
gap before the following content. Drop it everywhere to avoid this.
This module reads password from kernel keyring and sets it as PAM authtok.
It's inspired by gdm's pam_gdm, which reads the LUKS password stored by
systemd-cryptsetup, so Gnome Keyring can be automatically unlocked if set
to the same password (when autologin is enabled so the user doesn't enter
a password in gdm).
