[collectd-changes] collectd, the system statistics collection daemon: Changes to 'collectd-5.5'

[Florian Forster]

Rebased ref, commits from common ancestor:
commit a7b0cdea4f6a0f8d29ade21ae058182f720dd432
Author: David Gibson <david at gibson.dropbear.id.au>
Date:   Wed Aug 10 20:07:14 2016 +1000

    Fix conceptual buglet in default_callback
    
    The 'DERIVE' path in default_callback() increments the 'counter' field of
    value instead of the 'derive' field.  Since those fields have the same
    type and offset within the value union this will still work fine, but
    AFAICT it's conceptually incorrect.  This corrects it.
    
    Signed-off-by: David Gibson <david at gibson.dropbear.id.au>
    Signed-off-by: Florian Forster <octo at collectd.org>

commit 3d7453f6c3a13dc49e9ed6dd6d7a19202a3b087e
Merge: 7bfda8d 496ca2b
Author: Florian Forster <octo at collectd.org>
Date:   Sat Aug 6 20:33:54 2016 +0200

    Merge branch 'collectd-5.4' into collectd-5.5

commit 496ca2b758344bc6372ab0adf98ad8050f69b25a
Author: Florian Forster <octo at collectd.org>
Date:   Sat Aug 6 20:15:51 2016 +0200

    src/utils_db_query.c: Check return status of strjoin().
    
    Fixes: #4

commit 000a676164789647800cf6b265eb6b5e75bb9fdf
Author: Florian Forster <octo at collectd.org>
Date:   Sat Aug 6 20:00:34 2016 +0200

    libcollectdclient: Don't print anything to STDOUT by default.
    
    Even with --enable-debug. This behavior is now controlled by the
    "COLLECTD_TRACE" environment variable.
    
    Fixes: #105

commit 67a330cb7ba890a03142a089ed1aebea8842072f
Author: Florian Forster <octo at collectd.org>
Date:   Sat Aug 6 18:22:56 2016 +0200

    ping plugin: Let start_thread() return gracefully when thread is already running.
    
    Signaling an error caused the init function to signal an error, causing
    the read callback to be unregistered on systems where init is called
    more than once.
    
    Fixes: #869