Update etc-server/web/ssl

Use information from Mozilla wiki:
https://wiki.mozilla.org/Security/Server_Side_TLS

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
sysadmin/debian: add installation information about keyboard config

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
sysadmin/selinux: add a section about run_init

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>