To reduce the risk that the user running the tests has a .curlrc present
that messes things up.
Support 'option="no-q"' for the <command> tag to switch it off on demand.
Use this new feature in test 433 and 436.
Ref: #13284Closes#13387
... after the initial checks for .curlrc and if XDG_CONFIG_HOME is not
set, use $HOME and $CURL_HOME to check if ~/.config/curlrc is present.
Add test 436 to verify
Reported-by: Sandro Jaeckel
Fixes#8208Closes#8213