[1/2] Start fahbackup-rc (restore) in runlevels 2345.
Fixup fce9e9074dc7fcd2de2a7cc6ca4fe0dc0e1ece45. Use hardcoded /etc/sysctl.conf.
$SYSCTL_CONF variable is not populated at cleanup.
[2/2] (6924fb) With fahbackup-rc supporting fahrestore /etc/rc.local is no longer required. Remove old rc.local modifications, if any.
Samba: use literal tab in regex as \t doesn't quite cut it.
Samba: sync after modifying smb.conf.
Samba: add usershare after adjusting samba configuration.
This is necessary to support enabling useshares from fahinstall.
Samba usershare/selinux update [1/7]: replace "setting up" message with more appropriate "configuring".
Samba usershare/selinux update [2/7]: unconditionally enable usershares (allows usershare guest access, too).
Samba usershare/selinux update [3/7]: adjust SELinux security context of updated smb.conf accordingly
Samba usershare/selinux update [4/7]: create and configure usershare directory if absent

Create usershare group and add $SUDO_USER to it.
Allow (SELinux} samba to access user's home directories as well.
Samba usershare/selinux update [5/7]: unconditionally restart samba after configuration change.
Support Fedora and Ubuntu.
Samba usershare/selinux update [6/7]: allow samba (chmod) to access user's home directory
Samba usershare/selinux update [7/7]: produce a message when setting up actual fah share; add extra newline for readability
Perform unconditional fahbackup after all $TARGET operations are done.
This is for distributions running systemd (systemd recognizes a SysV
service only after starting it so a reboot is necessary before fahbackup
is properly called at shutdown).