Any submodule lines that had a CR-LF ending would be ignored by the parser.

Closes gitlab-org/gitlab-ce#2262

Instead of renaming existing storage directories to a timestamped
format, create a timestamped directory in a temporary location and move
the individual files and folders inside storage directories to it. This
helps us with nested storage directories.

We displayed the correct text as the link text (without double-encoding), but
didn't do the same for the actual link target, so any link containing an
ampersand would break when auto-linked.

This will use the same query as `\di` to find an index on postgresql.

Removes permanent redirects, this means that redirects will only be
possible as long as the old route isn't taken by a new project/group.

This reverts merge request !18002

When a repository does not exist on a remote, Gitaly won't be able to
clone it. This is correct behaviour, but from the clients perspective a
change in behaviour.

This change implements the client side changes that allows Gitaly to
execute a `git ls-remote <remote-url> HEAD`. This way the client has no
need to shell out to Git.

In the situation where multiple Gitalies are available, one is chosen at
random.

This commit closes https://gitlab.com/gitlab-org/gitlab-ce/issues/43929,
while its also a part of https://gitlab.com/gitlab-org/gitaly/issues/1084

When we added caching, this meant that calling `can_be_resolved_in_ui?` didn't
always call `lines`, which meant that we didn't get the benefit of the
side-effect from that, where it forced the conflict data itself to UTF-8.

To fix that, make this explicit by separating the `raw_content` (any encoding)
from the `content` (which is either UTF-8, or an exception is raised).