[Libguestfs] [PATCH] internationalisation: Replace autopoint infrastructure with libintl-perl

I noticed that virt-v2v, which is written exclusively in perl, failed to generate virt-v2v.pot. After much head scratching I also noticed that libguestfs.pot didn't include any messages from perl sources. Some reading of libintl-perl shows that a somewhat more complicated xgettext command line is required, as it doesn't understand Locale::TextDomain syntax by default. After a little more head scratching, I decided to replace the autopoint generated infrastructure with the reference infrastructure from libintl-perl because: 1. It works 2. It's a whole lot more transparent libguestfs still needs some attention in this area. This change may not be appropriate for libguestfs because it is not exclusively written in perl.