changes: many fixes and improvements
reviewed by John R. Shannon
pkgsrc notes:
-since S/MIME support is the biggest difference in functionality over
gnupg1, enable it per default -- my tests (with the s/mime plugin
of claws-mail) worked
-left the build against a private libassuan with GNU-pth support
alone for now, just updated libassuan to 1.0.5. We might build
pkgsrc/libassuan against pkgsrc/pth at some point, but this needs
to be checked for side effects. (As this pkg doesn't export a library
which might propagate the pth dependency, the possibility of
pthread-pth conflicts should be limited. Other uses of libassuan
need to be checked.)
GnuPG-2 provides several utilities that are used by mail clients,
such as Kmail and Balsa, including OpenPGP and S/MIME support.
GnuPG-2 has a different architecture than GnuPG-1 (e.g. 1.4.5) in that
it splits up functionality into several modules. However, both
versions may be installed alongside without any conflict. In fact,
the gpg version from GnuPG-1 is able to make use of the gpg-agent as
included in GnuPG-2 and allows for seamless passphrase caching. The
advantage of GnuPG-1 is its smaller size and the lack of dependency on
other modules at run and build time.
