Comment 2 for bug 522405

 1765 Wouter Bolsterlee 2010-02-22
      [i18n] Implement dpgettext(), dnpgettext() and npgettext()

      Extended the pgettext() logic to support text domains and
      renamed it to dpgettext(); then pgettext() is just
      convenience API that invokes dpgettext() with the default
      text domain.

      Also added the dnpgettext() function for plurals with
      context, similar to the dpgettext() implementation. The
      npgettext() function is, just like pgettext(), just
      convenience API that invokes dnpgettext() with the default
      text domain.

      Also changed the i18n.make helper script so that it
      correctly extracts all strings from source files.

      Fixes bug #522405.