loudmouth: Apply digest auth fix from Arch Linux.

Digest authentication otherwise won't work with MCabber, no matter
whether it's SHA1 or MD5.

Signed-off-by: aszlig <[e-mail]>
Tested-by: devhell <"^"@regexmail.net>

pkgs/development/libraries/loudmouth/default.nix

···
     sha256 = "1qr9z73i33y49pbpq6zy7q537g0iyc8sm56rjf0ylwcv01fkzacm";
   };
 
-  patches = [ ./glib-2.32.patch ];
+  patches = [
+    ./glib-2.32.patch
+    (fetchurl rec {
+      name = "01-fix-sasl-md5-digest-uri.patch";
+      url = "https://projects.archlinux.org/svntogit/packages.git/plain/trunk/"
+          + "${name}?h=packages/loudmouth";
+      sha256 = "0y79vbklscgp8248iirllwmgk4q0wwyl3gmxz7l9frc2384xvanm";
+    })
+  ];
 
   configureFlags = "--with-ssl=openssl";