* MM-8810: Add CSV Compliance export
* Only allowing to schedule actiances export throught the cli
* De-duplicating some code
* Fixes on texts
* Fixes on translations
* factor out GetSubpathFromConfig
* mv web/subpath.go to utils/subpath.go
* serve up web, api and ws on /subpath if configured
* pass config to utils.RenderWeb(App)?Error
This allows the methods to extract the configured subpath and redirect
to the appropriate `/subpath/error` handler.
* ensure GetSubpathFromConfig returns trailing slashes deterministically
* fix error 404 handling
* redirect /subpath to /subpath/
This is necessary for the static handler to match, otherwise none of the
registered routes find anything. This also makes it no longer necessary
to add trailing slashes in the root router.
Examine ServiceSettings.SiteURL on startup and rewrite assets
accordingly if not in a development environment.
Also export `mattermost config subpath` command to manually do same.
This accompanies a webapp PR to use the updated `root.html` to define
the necessary webpack asset path for dynamically loading assets.
