Bugfixes to backport to MacPorts 2.4.x

[Clemens Lang]

Hi,

----- On 9 Dec, 2017, at 18:16, Ryan Schmidt ryandesign at macports.org wrote:

> If we're not imminently ready to release MacPorts 2.5, here are some bugfixes I
> would nominate to be merged back to the release-2.4 branch to be released as
> MacPorts 2.4.3.

I would propose to also cherry-pick:

  sandbox: Allow file-write-data for /var/db/mds
  https://github.com/macports/macports-base/commit/1f76522228abba0d8383071b059daff726a8c9f6

  Close the portfiles after reading
  https://github.com/macports/macports-base/commit/c2df3cc958635f7ac6d0983288723c6ea097b221

-- 
Clemens Lang