crda: make reglib_for_each_country() use the reglib context

This allows users of reglib to iterate over the regdb
with just one open() and mmap() to be kept sharing as
much code as possible. This makes the regdbdump and
intersection code use the context therefore sharing
all that boiler plate code.

Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
4 files changed