The crude loop I wrote to come up with this changeset:

  find -L package/feeds/packages/ -name patches | \
  sed 's/patches$/refresh/' | sort | xargs make

Signed-off-by: Ilya Lipnitskiy <ilya.lipnitskiy@gmail.com>

Signed-off-by: Maxim Storchak <m.storchak@gmail.com>

A separate package which depdens on msmtp and nail is introduced.
Once more packages provide `sendmail` and `mail` interfaces, this
dependency can be made more flexible.

Signed-off-by: Maxim Storchak <m.storchak@gmail.com>