RutAuthentication doesn't authenticate when accessing nexus server not from it's root url

Short description:
RutAuthentication doesn't authenticate when accessing nexus server not from it's root url.

For example if initially you try to access your server via https://myserver/nexus/content/repositories/releases/
you will get http 401 response. This blocks maven deploy action.

I've reproduced this behavior in chrome browser:
1. Start chrome in incognito mode.
2. Navigate to https://myserver/nexus/content/repositories/releases/
3. Get 401 response (page says access denied)

On the other hand the following use-case works ok:
1. Start chrome in incognito mode.
2. Navigate to https://myserver/nexus/
3. RutAuthentication autologins you.
4. https://myserver/nexus/content/repositories/releases/
5. Now page (as expected) shows content of /repositories/releases