Add option to disable reporting of all cores other than total, as on
servers with large numbers of cores this can use a lot of disk space with
little interest in per core numbers.
Record the current maxconnections settings, so we've got it to compare
against in stats.
Try to get device mount information, but continue and log if it fails
Dont try to load collectors files that start with a period. It can be extended attribute files or vim backups or similar and can lead to some weird errors.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/collectors/diskspace/diskspace.py
Merge remote-tracking branch 'upstream/master'
Add additional stats to postgres collector
Bug fixes and query fixes; register queries
Add support for key => value style 2 column queries
Hack to get seq_scan / idx_scan query to work properly
Add locking around the flush call as well. This should prevent intermixed metrics going down the wire.
Remove unneeded str_to_bool
add support for network interfaces named p1p{1,2,...}
Merge pull request #312 from Dieterbe/network-iface-p1p

add support for network interfaces named p1p{1,2,...}
Exclude postgres catalog tables
Only query for a single db when multi_db is False
Silence unnecessary messages
Remove more unnecessary log messages
Merge remote-tracking branch 'upstream/master'
Merge pull request #315 from ciranor/master

Remove unnecessary log messages