Docs for rejoin-unsafe errand
Docs for rejoin-unsafe errand

[#118416751]
[ci skip]
Signed-off-by: Aaron Hurley <6c541e38cb40b4360b80e64c308405691f38e38a@pivotal.io>

cloudfoundry/cf-mysql-release,cloudfoundry/cf-mysql-release,cloudfoundry/cf-mysql-release,cloudfoundry/cf-mysql-release