Openssh 8.7 uses a stricter parser which does not permit empty option
values.
# Don't permit running local commands (default).
PermitLocalCommand no
-# Don't send any environment variables (default).
- SendEnv
-
# Don't hash any hosts in ~/.ssh/known_hosts. It doesn't help if the ssh hosts
# are stored in the shell's history file or in this file as shortcut so it's
# rather useless (default).
# peer".
MaxSessions 30
-# Don't accept any environment variables from the client (default).
-AcceptEnv
# Don't use ~/.ssh/environment and environment= options in
# ~/.ssh/authorized_keys because LD_PRELOAD could be used to circumvent
# authentications (default).