Bug 1086104 - improve the setting of TC_CHECK in oo-accept-node

By default TC is enabled.  Previously this check was assuming false if
TRAFFIC_CONTROL_ENABLED wasn't set.
Improving the inline docs for TRAFFIC_CONTROL_ENABLED in node.conf
Merge pull request #5269 from brenton/BZ1086104

Merged by openshift-bot
Bug 1087755 - node.conf#TRAFFIC_CONTROL_ENABLED defaults to true

* Fix check to assume true not false
Updated REST API docs
Merge pull request #5271 from jwhonce/bug/1087755

Merged by openshift-bot
Automatic commit of package [openshift-origin-cartridge-phpmyadmin] release [1.20.2-1].
Automatic commit of package [rubygem-openshift-origin-node] release [1.23.5-1].
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Automatic commit of package [openshift-origin-cartridge-haproxy] release [1.23.4-1].
Automatic commit of package [openshift-origin-cartridge-jbosseap] release [2.16.2-1].
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Automatic commit of package [openshift-origin-cartridge-python] release [1.23.3-1].
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