mod_ssl: Minor cleanup to avoid defining init handling functions for

mod_ssl: Minor cleanup to avoid defining init handling functions for
pre-1.1 builds where they are noops or unused.  No functional change
(intended).

* modules/ssl/mod_ssl.c: Define NEED_MANUAL_OPENSSL_INIT for builds
  where pre-1.1 OpenSSL needs "manual" initialization/cleanup.  Only
  define modssl_running_statically for this case (otherwise it is set
  and never read).
  (modssl_is_prelinked): Only define for NEED_MANUAL_OPENSSL_INIT.
  (ssl_cleanup_pre_config): Only define for NEED_MANUAL_OPENSSL_INIT;
  otherwise it is a noop returning APR_SUCCESS;
  (ssl_hook_pre_config): Only install the cleanup and initialize
  modssl_is_prelinked for NEED_MANUAL_OPENSSL_INIT build.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1877440 13f79535-47bb-0310-9956-ffa450edef68