Add AP_INIT_TAKE_ARGV. There can be some inconsistent results because of the behavoir...

Add AP_INIT_TAKE_ARGV. There can be some inconsistent results because of the behavoir of ap_getword_conf. Do not rely upon any last argument that is "".  If the argument is in the middle of the line, it should work correctly.

This is updated from the version sent to dev@httpd to fix the behavoir with 0 arguments.

* include/http_config.h: minor MMN bump for the new interface.
* modules/generators/mod_autoindex.c: Migrate IndexOptions to the new ARGV command type.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@168202 13f79535-47bb-0310-9956-ffa450edef68