This reverts commit 55c385e96e6594ec1ac3b5cd41ccd2df6048b696, reversing
changes made to 61bb29d492.

it's for zh_TW(Taiwan)

  + use request instead of session to flag authentication status
    and user, for external authentication types

All tags that reference to particular object are stored in a list within a map.
There is a if statement that inits empty list when there are not references
to the current object yet, but the boolean expression checks for the wrong value.

The projects page was showing the project listing directly under the navbar
with no spacing. This adds spacing to have the elements offset.

The table is showing using the common "repositories" class, however it can't
be changed directly since several other table displays use the same class, and
have adequate top margin spacing. We create a new class for the one-off use
on the projects page.

commit c20191fc09 enabled support
for hiding internal URLs, but didn't consider that it broke the
evaluation of permissions (used for tickets, etc.), and caused
a NPE on repoUrl.permission when trying to view the TicketPage.

With all internal mechanisms disabled, it would result in the
first URL being external with unknown permissions. This adds an
option to use internal permissions even for external URLs.

Note that this does not grant any additional permissions, but
does offer the option to have gitblit advertise the full set of
what is allowed, even if the external URL imposes additional
restrictions.

Previously used request scheme, but request scheme is unrelated to
the URL being generated. Instead, base the permission capping on the
scheme of the URL itself.

Running gitblit in a container it's easy to expose the ssh on the default port.
Using git.sshDisplayPort/git.sshDisplayHost you can expose the forwarded address
as the official location.

JGit 4.0.0 fixes a memory leak but introduces a non-compatible change
for closing the RevWalk: before it was release() but now is close()

- try userRealm as a file only if class is not found, other exeptions are real error
- log userService only after setup, for better logging, as it can use gitblit.properties for custom .toString

Removed default "watchedby" filter so that the default now includes "createdby", "responsible", watchedby" and "mention"

Also, minor refactoring to avoid code duplication.