Warn if ttl is out of bounds
network: set ttl before opening server sockets

If TimeToLive is defined in collectd.conf after Server options, the
net_config_ttl value is updated after network_config_add_server and
the desired ttl is not used.
patch required to build oracle plugin, collectd-5.4.0 (#653)
mistake
mistake, SAVE_LIBS="$LIBS" is correct.
Merge branch 'fix-config-oracle' of https://github.com/komeda-shinji/collectd into fix-config-oracle
per-url intervals for curl_json
Merge pull request #662 from komeda-shinji/fix-config-oracle

patch required to build oracle plugin, collectd-5.4.0 (#653)
correctly generate LOAD_PLUGIN_LOG_LOGSTASH for substitution
Merge pull request #654 from timl/fix_ttl_order

Fix ttl order
Fixing misplaced block in documentation.
Merge pull request #687 from txaj/fix-doc-postgresmodule-sslmode

Fixing misplaced block in documentation.
Merge pull request #685 from teftin/curl-json-per-url-interval

per-url intervals for curl_json
conditionally use rd_kafka_conf_set_log_cb, fixes #686