Include warning after connecting to the daemon

[stdedos]

Multiple times I forgot to not use E or I while trying to remotely work with a server.
Maybe include your warning after a successful connection?

"Warning: Please, be careful if you use 'e' (tErm) and 'i' (kIll). This will kill all processes, including sysrqd!"

[dagelf]

Here you go: da6a65c

https://github.com/dagelf/sysrqd