The automagic detection isn't really problematic, and we allow people to
easily override this when detection isn't possible. On the other hand,
if people haven't configured rc_sys in their rc.conf, the lack of auto
detection can easily lead to an unbootable system.
Further, we're attempting to have a stable shared library ABI, which
dropping funcs from is not feasible.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>