Fixes the display of client counts, which are numbers and not strings
in the respondd data.

Fixes: 3a885a1b ("gluon-status-page: make "gateway nexthop" a link (#2278)")

Do not depend on the respondd-airtime module just to get the configured
channels. This removes the display of the frequency in addition to the
channel, as it is not readily available.

In addition, the translation string is improved to allow for text after
the channel number.

This code is usually running on an embedded CPU without FPU. In
addtition to its inefficience, the algorithm is also much harder to
understand.

Replace the logarithm formula with a simple loop.

With this commit, the gateway nexthop is now a clickable link, that leads
to the status page of the nexthop.

overflow for 'DejaVu Sans'.

This adds the wireless client count for 2.4GHz and 5 GHz radios to the
status page. Previously, only the total client count advertised by
the mesh protocol was visible.

This reverts commits
- caf2dd03.
- 07ebac6a
- 55eff45f

I accidentally pushed these commits as I had them lying around on a
dirty checkout I did testing on.

The original commit only applied its changes to the source file and did
not rebuild the minified file, therefore the change never went live.

Fixes: #659
Signed-off-by: Martin Weinelt <martin@darmstadt.freifunk.net>

The field was accidentally removed during the status-page rewrite.

Fixes #1401

batman-adv-specific parts are moved to a new package
gluon-status-page-mesh-batman-adv.

gluon-status-page: reduce usage of absolute paths in cgi-bin scripts neighbours-nodeinfo and stations

Some HTTP endpoints were writing annoying "broken pipe" messages to stderr.

A downside of this behaviour is that the page does not work for IPv4-only
clients, as the redirect will always point at an IPv6 address.

Still, it seems like a good idea to enforce the redirect even from the IPv4
next-node address, as switching nodes while being connected to the status
page would lead to unexpected behaviour.

All Access-Control-Allow-Origin are removed to improve users' privacy. As
the status page API is thus not useful without the status page anymore,
merge them back into a single package.

The status-page-api respondd provider is removed as well.

Fixes #1194

This new status page is significantly smaller than the old one. It always
loads its resources from the same host as the page itself, not requiring
cross-origin requests anymore.

It also uses the common i18n infrastructure of gluon-web.

Fixes #914

We have Git for history, there's no reason to keep old files that aren't
used anymore.

This will make it easier to replace the API with C programs.