Fix handle -W in fcgi mode to set CLICON_RESTCONF_USER

[yamontv]

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[yamontv]

Hi @olofhagsand . I think the option was missed somehow for the fcgi version. It is availbale for the native though.

[olofhagsand]

Correct. And for symmetry it should be there too.
Note you can also use -o CLICON_RESTCONF_USER=<myuser> instead.
So the other alternative would be to drop both.
Do you find -W useful?

[yamontv]

I was testing the command-line options and noticed that this one is not actually available, although it is listed in the usage. I was able to resolve it by setting CLICON_RESTCONF_USER in the config.
Still, it may be worth implementing it to keep the interface consistent and preserve flexibility. From a maintenance point of view, adding it for symmetry seems easier than removing it from all the places.