rotatelogs: Remove last constant length error buffer.

* support/rotatelogs.c
  (ERRMSGSZ): Remove.
  (rotate_status): Remove errbuff member.
  (truncate_and_write_error): Accept the error message as an argument.
  (doRotate): Shift the pool destruction slightly later and use it to generate
    the error message to pass truncate_and_write_error().
  (main): In case of write errors create a pool to generate the error message,
    since the other pools available may never been freed.  Adjust to pass
    message directly to truncate_and_write_error().


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1534914 13f79535-47bb-0310-9956-ffa450edef68