OpenSSL 1.1.0 compat:

- move IDCONST macro outside of addition #if check.
  Otherwise we break compatibility with old
  OpenSSL 0.9.8 releases.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1755856 13f79535-47bb-0310-9956-ffa450edef68