designate 5.0.0.0rc1 release candidate

meta:version: 5.0.0.0rc1
meta:diff-start: -
meta:series: pike
meta:release-type: release candidate
meta:pypi: no
meta:first: no
meta:release:Author: Graham Hayes <graham@hayes.ie>
meta:release:Commit: Graham Hayes <graham@hayes.ie>
meta:release:Change-Id: I0a0664d40ed7e0d00f8f7fa96185b27c8dfbf314
meta:release:Code-Review+2: Sean McGinnis <sean.mcginnis@gmail.com>
meta:release:Code-Review+2: Davanum Srinivas (dims) <davanum@gmail.com>
meta:release:Workflow+1: Davanum Srinivas (dims) <davanum@gmail.com>
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