Move some groups from the "1.8.1 or soak restart" section to the
"1.8.0" section.  There's really no good reason to delay the release
of any improvements unless the implementations thereof involved
destabilizing changes.

git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.8.x@1486139 13f79535-47bb-0310-9956-ffa450edef68