More information on how to submit vulnerablities on arch linux
components and infrastructure, as well as how to report issues with
packages is necessary to ease the vulnerablity disclosure process.

Signed-off-by: Santiago Torres <santiago@archlinux.org>

The old behavior that followed a login attempt was to redirect to the
index, which used to be the index (equivalent to index_vulnerable). With
the new security splash page, this behavior breaks. While it is still up
to discussion whether the after-login behavior should be to redirect to
the security splash page instead of index_vulnerable, for now we still
need to keep the existing behavior. Rewire the redirects on from
tracker.index to tracker.index_vulnerable on the login views. Finally,
update test_login to reflect this behavior.

Signed-off-by: Santiago Torres <santiago@archlinux.org>

test_index used to have a test that targeted the '/' url. Since index
does not respond to that url anymore, the test should be removed.
Instead, a simpler version of the same test is added on a new module
called test_home.

Signed-off-by: Santiago Torres <santiago@archlinux.org>