Add option for for log directory

[Wuodan]

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• I have read and understood the developer guide in kovri-docs.
• I have checked that the issue I am reporting can be replicated or that the feature I am suggesting is not present.
• I have checked opened or recently closed pull requests for existing solutions/implementations to my issue/suggestion.

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By default, kovri writes logs to the directory ~/.kovri/log in form of a file per day.
One can specify an alternative path with --log-file-name, but that will always be the same file name.

I would like the possibility to specify a folder path, where a log file per day is created.

Possible solutions:
a) Rename --log-file-name to --log-path. If it's a file, write to that file. If it's a folder, create a file per day there.
b) An additional option --log-folder. Incompatible with --log-file-name.
(These are just ideas!!)

[coneiric]

An additional option --log-folder. Incompatible with --log-file-name.

Just speaking for myself, two command-line options seem like a better solution. That way a user can specify custom directory and filename independently.

Why would the two options need to be incompatible?

[anonimal]

Why would the two options need to be incompatible?

Because a filename could contain a path. I personally wouldn't bother with the work involved to sanitize filename and instead would opt for a single --log-dir option.

[anonimal]

NOTICE: THIS ISSUE HAS BEEN MOVED TO GitLab. Please continue the discussion there. See #1013 for details.