support hushlogin - less output in terminal emulator

Development
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https://manpages.debian.org/unstable/login/login.1.en.html

HUSHLOGIN_FILE (string)

If defined, this file can inhibit all the usual chatter during the login sequence. If a full pathname is specified, then hushed mode will be enabled if the user’s name or shell are found in the file. If not a full pathname, then hushed mode will be enabled if the file exists in the user’s home directory.

$HOME/.hushlogin

+ seems good to support:

/etc/hushlogin
/usr/local/etc/hushlogin

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