Also fix unit tests.

Still part of #28254.

Fixes #28254.

migrated all files and references from org/torproject/onionoo to org/torproject/metrics/onionoo; added package-info.java for all new packages

Avoids parse issues with previously deprecated and later removed
fields like "as_number" in details documents.

Still related to #23713.

This commit actually only disables the "fingerprint" parameter. Even
though we gave people a 1 month warning, it might happen that somebody
comes along next week and tells us their truly important use case why
they still need this parameter. Once we're really sure this won't
happen, we can rip out some more code that was necessary to implement
this parameter.

Implements #26919.

Implements #25175.

Implements #25177.

Changes the current behavior of the "version" parameter by moving away
from string prefix matching to actually parsing provided (partial)
versions. As a result, for example, "version=0.3.2.1" doesn't
magically include versions 0.3.2.10 to 0.3.2.19, 0.3.2.100 to
0.3.2.199, etc. anymore. Without this change, version ranges would
have become just too confusing. The downside is that this change
requires a major version bump.

Implements #6947.

If the first thing we'd learn from a bridge was an extra-info
descriptor, we would not have stored the contained transports. This
case is very unlikely and has very little effect. Worth fixing anyway.
Found via code analysis.

Note that the previous code was not wrong. It declared a local
variable and it read a line (containing headers). But these are two
distinct things, and doing them on one line confused the code
analyzer. Splitting them is just fine.

Turns out that characters inside square brackets don't need to be
escaped. In fact, "^[0-9\\.]{7,15}$" does not only match valid IPv4
addresses but also strings like "1\2\3\4".