Coding style: fix indents
thresholds: Log the current value of a DS value when generating an OKAY notification
thresholds: Fix calculation of hysteresis

The old code would never emit a notification when the value changed between the
WARNING and FAILURE; the reason was that each branch in the switch statement
only checked the "old" thresholds valid for the previously encountered state.
That is wrong and pretty dangerous, as there will be no notification when a
values progresses slowly from OK to WARN to FAIL.

Fixes #578.
Fix a few typos
Fix the conversion of time option in PUTNOTIF
	from timestamp to cdtime_t
Plugin java: fix notification time conversion to cdtime_t.
Plugin threshold: time is not set in missing notifications.
cmd PUTNOTIF time option: handle double values.
FLUSH cmd: convert timeout (double) to cdtime_t
  as the previous call to plugin_flush
amqp: new Queue{Durable,AutoDelete} options are subscribe-only options
document 2 new options added to amqp plugin
onewire: add other temperature-providing sensor families
make configure summary consistent
Move threshold_search and threshold_get to utils_threshold.c
Renable getthreshold cmd in unixsock Plugin.
Merge branch 'mlsr/unixsock_getthreshold' of https://github.com/manuelluis/collectd
Merge pull request #674 from manuelluis/mlsr/unixsock_getthreshold

Plugin unixsock: reenable getthreshold cmd.
Merge branch 'master' of github.com:collectd/collectd
Merge pull request #659 from mfournier/amqp-fixups

Amqp fixups
Merge pull request #647 from manuelluis/mlsr/threshold-missing_time

Plugin threshold: time is not set in missing notifications.