Merge r1533810, r1533935, r1666417 from trunk:

Merge r1533810, r1533935, r1666417 from trunk:

Add an option to autocreate directories to rotatelogs.

* support/rotatelogs.c
  (rotate_config): Remove const from szLogRoot since we'll be passing it to
    apr_filepath_merge.  Add create_path member.
  (usage, dumpConfig): Update to reflect new -d option.
  (doRotate): Add code that knows how to create the directories a log file
    is going to go into.
  (main): Add the -d option and canonicalize the incoming path with
    apr_filepath_merge() so that the code in doRotate can work properly.

* docs/man/rotatelogs.8,
  docs/manual/programs/rotatelogs.html.en: Update for -d option.

PR: 46669
Submitted by: Philippe Lantin <plantin cobaltgroup.com>
              (which was actually a patch written by myself when I worked there)
Tweaked by: breser (ported to trunk and changed option from -p to -d)

Followup to r1533810: Put the rotatelogs docs in the right place.

* docs/man/rotatelogs.8,
  docs/manual/programs/rotatelogs.html.en: Remove changes from r1533810.

* docs/manual/programs/rotatelogs.xml: Adjust docs for new -d option.

Choose "-D" instead of "-d" for the rotatelogs
option that creates the path to the log file.

I want to use "-d" for another directory related
option next where (I think) the "directory" "d"
makes more sense.

"-d" has not yet been backported, so changing
to "-D" is not a real compatibility issue.

Submitted by: breser, rjung
Reviewed by: rjung, ylavic, niq

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1828738 13f79535-47bb-0310-9956-ffa450edef68