Do not override it in the example configuration file.

This was already the default in Docker-based clients.

The reason for `127.0.0.1` and not something less prone to clashes like
`127.7.2.1` (as we do in the injector) is that the client is expected to run
on many platforms (while we can assume GNU/Linux for the injector), and not
all of them support binding to addresses in `127.0.0.0/8` other than
`127.0.0.1` (e.g. macOS and other BSD-based systems).

Thus it becomes more reasonable to choose a less crowded port (8077 in this
case).

127.0.0.1 -> 127.0.0.137 (to be less standard and so avoid clashes)

And removed V1 prefixes and suffixes from the rest of the storage code.

Use `/logfile.txt` instead of a query string to ease saving it or opening it
in some text viewer or editor.

Instead of closing the connection, as that prompted the UA to furiously
retry sending the same request many times.

It was causing crashes on Android

This adds several enhancements for HTTP store maintenance:

  - Removal of entries older than `max-cached-age`, as well as temporaries not
    seeing progress.
  - A periodic garbage collector for such entries.
  - Removed entries are no longer announced in the DHT.
  - Reporting of (approximate) local cache size in the status API and client
    front-end.
  - A button to purge the local cache in the client front-end.
  - Cancellable local cache iteration and cleaning operations.

Among other minor fixes, this allows the client to cache the URI swarm name
prefix, avoiding extra encoding every time it is needed.

To avoid having to build the whole name (which implies encoding the injector
public key) every time a URI swarm name is needed.

It was previously on some internal document.

This includes several fixes related with automatic swarm name computation:

  - Use lower-case, unpadded Base32-encoding for injector keys in swarm names.
  - Disable obsolete `announce-in-bep5-swarm` injector option in Docker
    wrapper script.
  - Show injector public key in the client front-end (to ease showing it to
    other users).
  - Also allow setting the injector public in Base32-encoded format for the
    `--cache-http-public-key` client option (to ease receiving it from other
    users in written form).

Padded or unpadded, upper or lower case.

Only explicit BEP5 swarm names conflict with automatic swarm name derivation.

The injector BEP5 swarm name is computed automatically now.

The injector BEP5 swarm name is computed automatically now.

This encoding is more amenable to human exchange shall we accept it as input,
so better start using it now and avoid having to change the general swarm name
derivation method further down the road.

Some operations on the whole store may take a while.