[Bug 978] New: pmlogrewrite does not cull indom when no metric uses the indom

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Bug ID	978
Summary	pmlogrewrite does not cull indom when no metric uses the indom
Product	pcp
Version	unspecified
Hardware	All
OS	Linux
Status	NEW
Severity	normal
Priority	P5
Component	pcp
Assignee	pcp@kenj.com.au
Reporter	kenj@internode.on.net
CC	pcp@oss.sgi.com
Classification	Unclassified

Various config file changes like
metric foo { delete }
or
metric foo { indom -> 123.456 }
have the effect of reducing the number of references to an indom in the archive
... if the number of references goes to zero, the indom should be culled from
the metadata file.  This is not happening.

To understand why this is a problem, consider an archive with proc.* metrics
included by mistake ... this produces a huge metadata file that cannot be
shrunk by pmlogrewrite, even if the proc.* metrics are all deleted.

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