Splits the docs for log_server_status and split-logfile into their own

separate docs. The "other" file has dwindled over the years, and having
"other" just list two things seems a little silly. Also, update
log_server_status doc to reflect current reality.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1332679 13f79535-47bb-0310-9956-ffa450edef68