This interface only ever provided two of the many fields in details
documents.

Fixes: #27180

 * AS0 is an allowed value. This is used for unknown AS numbers.
 * Leading zeros are stripped from the AS number.
 * If an AS number is larger than the maximum possible (in 32-bits)
   then this will be treated as an error.
 * Tests are increased to cover additional cases.

Fixes: #27163

 * SortedSets are used in place of Lists to ensure deterministic
   ordering of looked up names
 * The NodeStatus serialization is extended to include verified
   and unverified host names
 * The existing host name field in NodeStatus serializations is
   removed and a placeholder inserted
 * The last reverse DNS lookup time is now only updated on successful
   lookups
 * The host name field is removed from summary and details documents
 * Tests are updated to use SortedSets in place of Lists

Fixes: #27050

Fixes: #27124

Fixes #27039.

Resolves #26969.

In the implementation of more accurate DNS resolution, the DirContext
used by JNDI lookups was shared in a utility class. It turns out that
InitialDirContext, the implementation we used, is very not thread-safe
and so as a result lookups would often fail to complete.

This commit creates a new DirContext for every lookup. The overhead in
doing so is minimal and ensures that we do not have thread safety
issues.

This commit also increases RDNS_LOOKUP_WORKERS_NUM to 30 (from 5). The
majority of time in these threads is spent waiting for replies and so
there are gains to be had in increasing the number of requests in
flight.

Fixes: #26963

Implements the first part of #26919, which is to find out whether the
"fingerprint" parameter is used at all.

Implements the last part of #23713.

Implements another part of #23713.

Implements part of #23713.

Implements #25448.

Jackson can convert names to snake_case by itself just fine.

Prepares #24296.

The filter is applicable to both bridges and relays. It uses basic
string operations to extract the operating system from the platform line
of descriptors.

Fixes: #6946

A missing descriptor directory has caused an IllegalStateException
when we attempted to write our parse history files. Let's be more
careful about this case and skip this history file if there is no such
directory.

Fixes #26711.