master: add a custom step field in dynazoom

With the advent of supersampling plugins, we can have sub-5min values. This
also means that the resolution might change when zooming. Usually this is the
desired behavior, but sometimes we want the averaged value.

Leaving it empty stays as previously : it uses the finest precision available.
cgi-graph: also accept csv & json extensions
cgi-graph: Adding csv output
cgi-graph: adding json output
cgi-graph: adding xml output
cgi-graph: fix typo
cgi-graph: fix xml output
Merge pull request #54 from Flameeyes/hddtemp-vlabel

hddtemp*: avoid using the degrees symbol in vlabel.
munin-limits: Add --always-send, --force options

--force is reinstated with the same functionality it had before 2.0.8.  It is
now an alias for "--always-send ok,warning,critical,unknown"

Also:

 * Update sphinx documentation and pod for man page
 * Add a validation function for the always_send data
 * Add tests for the validation function.
snmp__df.in: convert to use Munin::Plugin::SNMP.

This basically removes lots of boilerplate code that is already
available in that module, and simplifies the plugin a lot. It does not
change the output beside for dropping the final _ in the services'
names.
Merge branch 'gfx-textual-output' into devel
snmp__df: restore old fieldname before rewrite.

In 19f0399dce258090c6d37410251cd2dfb520377b, get_name_by_mp() was edited to
have saner field names. Yet, changing the field names of an existing plugin is
bad as you loose history connectivity.

This commit reverts to the non-sane, but history compatible, field names.
fail2ban: Handle the case where no jails are configured.

This fixes https://bugzilla.novell.com/show_bug.cgi?id=795535
Merge pull request #57 from schuetzm/bnc-795535

fail2ban: Handle the case where no jails are configured.
ntp_: rewrite plugin to support IPv6

Closes Debian bug #558800 and Munin trac ticket #775
Treat empty query param as absent.

With this fix, both
	dynazoom.html?cgiurl_graph=&plugin_name=...
and
	dynazoom.html?plugin_name=
now fall back to the default value for cgiurl_graph.

This is needed to make fallback to the default path work if the user
hasn't specified it explicitly in /etc/munin.conf. Previously, the
empty string would have been used as path for cgiurl_graph.
Merge pull request #59 from schuetzm/querystring-defaults

Treat empty query param as absent.
Merge branch 'gfx-custom-step' into devel
dists: remove all dists specific stuff

Since the move to git, it's much more practical to have an official repository
as "clean" as possible.

Therefore, I'm putting all packaging specifics outside the repo, explaining
where to find it. This only makes official what happened since a while, as the
dists/ dir is no accurate anymore.

Note that we work even more closely with packagers than before. This enables a
much faster integration and factoring of patches, as it factors out much of the
noise.
README: add some light on what happens to contributions