Revision 436747

- Update to 2.9.0
- Remove MAKE_ARGS, CPPFLAGS, LDFLAGS - handled by configure
- Use configure to handle DEBUG option
- Add description for OPTIMIZED_FLAGS
- Disable OPENMP option for now - impossible to use without significant
  manual intervention on 10.x-11.x (needs devel/llvm39 or modern gcc)
- Use configure to handle SSE option (only provided on i386/amd64, enabled by default on amd64)
- Conditionally install DOCS

PR:	217987
Submitted by:	Anton Yuzhaninov <citrin+pr@citrin.ru> (except OPENMP stuff)