src: perform evaluation after parsing

src: perform evaluation after parsing

Since 61236968b7a1 ("parser: evaluate commands immediately after
parsing"), evaluation is invoked from the parsing phase in order to
improve error reporting.

However, this approach is problematic from the cache perspective since
we don't know if a full or partial netlink dump from the kernel is
needed. If the number of objects in the kernel is significant, the
netlink dump operation to build the cache may significantly slow down
commands.

This patch moves the evaluation phase after the parsing phase as a
preparation update to allow for a better strategy to build the cache.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>