debian/patches:

 + remove build_against_libcurl, included upstream.
 + remove conversation_libexecdir, included upstream.
 + remove gnunet_PATHMAX.patch, included upstream.
 + remove kfreebsd_malloc_np.patch, included upstream.
 + remove noinst_set.diff, included upstream.
 + refresh fix-bashism.patch.
 + refresh and add new fixes in typos.diff.