sslh: Removal of sslh addon

sslh: Removal of sslh addon

- As discussed in the Dev conf call on 2024-Apr-08
- sslh has not been functioning since last update ion Sep 2021. Configuration syntax
   was radically changed somewhere in the update from 1.7a(2013) to 1.22c in Sep 2021
- removal of sslh from make file
- removal of lfs file
- removal of rootfile
- removal of paks files
- removal of initscript

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>