Use variable localhome to determines whether the localhome module is installed.
Default: localhome=false
Further changes:
- Move pam-exec from common-auth to common-session
- Move pam-mkhomedir before pam-mount to avoid double login on first use
on localhome devices
- user-home is on local disk
- additional entry in dolphin: home@server
- display info about localhome on login-screen
- provide unison-config for sync home with home@server
- force user to be logged out immediately after first login, because
home-dir must exists for bind-mounts on /lmn/media
