Fix a bug in authz logic merging which caused

        section->op == AUTHZ_LOGIC_AND
        auth_result == AUTHZ_DENIED_NO_USER
        child_result == AUTHZ_GRANTED
to return AUTHZ_GRANTED instead of AUTHZ_DENIED_NO_USER.

While there, refactor the if blocks to make them a bit more readable.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1056713 13f79535-47bb-0310-9956-ffa450edef68