Add upstream PGP signing key.

debian/changelog

@@ -1,3 +1,9 @@
+dulwich (0.9.4-2) UNRELEASED; urgency=medium
+
+  * Add upstream PGP signing key.
+
+ -- Jelmer Vernooij <jelmer@debian.org>  Wed, 29 Jan 2014 00:30:26 +0000
+
 dulwich (0.9.4-1) unstable; urgency=low
 
   * New upstream release.

debian/watch

@@ -1,2 +1,3 @@
-version=2
-http://samba.org/~jelmer/dulwich/dulwich-(.*).tar.gz
+version=3
+opts="pgpsigurlmangle=s/$/.asc/" \
+	https://pypi.python.org/packages/source/d/dulwich/dulwich-(.*).tar.gz