master: fix limits computation for ABSOLUTE

As bobkare reported on IRC:

    ... limits for ABSOLUTE fields are matched against raw input
values rather than value/$poll_interval like other time-based
counters?

This commit does fix the issue. Limits do now behave like their
COUNTER & DERIVE counterparts.
Merge branch 'fix-absolute' into stable-2.0
Revert "plugins/Plugin.pm: fix bad state file handling"

This reverts commit bf7a258081d64bb6174f83482d5d6dd53cb5909a.

It breaks some plugins, like diskstats.
Merge branch 'fix-state' into stable-2.0
2.0.14
Merge branch 'master'; commit '2.0.14'
plugins/Plugin.pm: fix bad state file handling (fixed)

This commit is a redo of bogus bf7a258081d64bb6174f83482d5d6dd53cb5909a
and it includes the fix from sweetpea in ticket 1342.

Closes: #1342
Merge branch 'fix-state' into stable-2.0
master/www: Add the graph name on top of images

As twinings216 reported in ticket #1349 :

    It's very convenient to use ctrl-f to find a graph in the browser. This
    depends on the textual titles of the graphs being present on the page,
    which was there in previous versions of munin, but not in the current
    version. This would add it back.

Closes: #1349
Merge branch 'ticket-1349' into devel

Conflicts:
	master/www/munin-nodeview.tmpl
asyncd: minrate defaults to update_rate

Having $minrate > $update_rate leads to unexpected results as it will
not poll as fast as expected.

This enables to only set $update_rate and have $minrate set
automatically to a sane value.
Merge branch 'fix-minrate' into devel
Adding 2.1.0
getversion: devel is 2.1, so using regular rules
Merge commit '2.0.14' into devel

Conflicts:
	ChangeLog
	plugins/lib/Munin/Plugin.pm
ChangeLog: adding 2.1.1
Fix for munin-cgi-graph crash in trend and predict.

 - use get_field_name on the fieldnames for trend and predict.  A too long
   internal field name would make munin-(cgi-)graph crash.

 - bonus fix: use the label, and not the internal name, for the predict and
   trend labels.  (df graph will use "/home predict" instead of "_dev_vg0_home
   predict", or similar)
master: adding ":" to the allowed chars in CGI

":" is a valid char for an IPv6-enabled "ip_" plugin
Merge branch 'fix-ipv6' into stable-2.0
Merge branch 'trend_predict_crash' into stable-2.0