libpcp_web: implement labelset metadata decoding in discover API
libpcp_web: implement labelset metadata decoding in discover API

Implement pmDiscoverDecodeMetaLabelset() to decode labelset records
from the metadata volume of discovered/monitored PCP archives. This
also calls all registered pmDiscoverLabelCallBack functions, if any.

libpcp_web/src/exports has not yet been updated.

modified:   src/libpcp_web/src/discover.c

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp