--version argument should only print the version

[davidak]

Would you accept a PR with this change?

This would also clean up future bugreports.

Expected behavior

I expect to get just the version number.

Like with other tools:

$ git --version
git version 2.19.2

$ man --version
man 2.7.5

$ chromium --version
Chromium 74.0.3729.108

Actual behavior

root@gsm:~# gsad --version
Oops, secure memory pool already initialized
Greenbone Security Assistant 8.0.0
Copyright (C) 2010 - 2019 Greenbone Networks GmbH
License GPLv2+: GNU GPL version 2 or later
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

I also get a bunch of other information not related to the command.

Steps to reproduce

1. gsad --version

GVM versions

gsa: 8.0.0

gvm: 8.0.0

openvas-scanner: 6.0.0

gvm-libs:

Environment

Operating system: GOS 5

[bjoernricks]

You are right this is much to verbose currently.