Configuration / build: make it possible to disable building of modules

While we're at it, sort out inconsistencies with the build of modules:
- not building shared libraries means not building dynamic engines.
  However, other modules may still be built.
- not having DSO functionality doesn't mean not to build modules (even
  though we can't use them from apps linked with libraries that are
  built this way).

Reviewed-by: Paul Dale <paul.dale@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/8623)