[pkgng/pkgng] fa5dd5: Add new pkg_plugin_{errno,error,info} to emit info...

[Baptiste Daroussin]

  Branch: refs/heads/master
  Home:   https://github.com/pkgng/pkgng
  Commit: fa5dd5de40340ffa2aebeae0643e9aabf56e211d
      https://github.com/pkgng/pkgng/commit/fa5dd5de40340ffa2aebeae0643e9aabf56e211d
  Author: Baptiste Daroussin <bapt at FreeBSD.org>
  Date:   2012-10-30 (Tue, 30 Oct 2012)

  Changed paths:
    M libpkg/pkg.h
    M libpkg/pkg_event.c
    M pkg/event.c

  Log Message:
  -----------
  Add new pkg_plugin_{errno,error,info} to emit information from the plugins
thought the event interface