Simplify state handling in rotatelogs, fixing -L support in the case

where open() fails for a new log file.

* support/rotatelogs.c (struct logfile): New structure.
  (struct rotate_status): Store only current logfile state here, using
  struct logfile.
  (close_logfile): Rename from closeFile; assume a valid logfile
  structure is passed in; simplify to use stored filename.
  (checkRotate, main): Adjust for new structure.
  (post_rotate): Adjust, move linkfile handling here.
  (doRotate): Simplify.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1140138 13f79535-47bb-0310-9956-ffa450edef68