gnu: Add radicale.

* gnu/packages/dav.scm (radicale): New file.
* gnu-system.am (GNU_SYSTEM_MODULES): Add it.

gnu-system.am

@@ -80,6 +80,7 @@ GNU_SYSTEM_MODULES =				\
   gnu/packages/databases.scm			\
   gnu/packages/datamash.scm			\
   gnu/packages/datastructures.scm		\
+  gnu/packages/dav.scm				\
   gnu/packages/dc.scm				\
   gnu/packages/debug.scm			\
   gnu/packages/dejagnu.scm			\

gnu/packages/dav.scm

@@ -0,0 +1,50 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 Leo Famulari <leo@famulari.name>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix is free software; you can redistribute it and/or modify it
+;;; under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation; either version 3 of the License, or (at
+;;; your option) any later version.
+;;;
+;;; GNU Guix is distributed in the hope that it will be useful, but
+;;; WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (gnu packages dav)
+  #:use-module (guix build-system python)
+  #:use-module (guix download)
+  #:use-module (guix licenses)
+  #:use-module (guix packages)
+  #:use-module (gnu packages python))
+
+(define-public radicale
+  (package
+    (name "radicale")
+    (version "1.1.1")
+    (source (origin
+             (method url-fetch)
+             (uri (pypi-uri "Radicale" version))
+             (sha256
+              (base32
+               "1c5lv8qca21mndkx350wxv34qypqh6gb4rhzms4anr642clq3jg2"))))
+    (build-system python-build-system)
+    (propagated-inputs
+      ;; TODO: Add python-pam
+     `(("python-requests" ,python-requests)))
+    (synopsis "Basic CalDAV and CardDAV server")
+    (description "Radicale is a CalDAV and CardDAV server for UNIX-like
+platforms.  Calendars and address books are available for both local and remote
+access, possibly limited through authentication policies.  They can be viewed
+and edited by calendar and contact clients on mobile phones or computers.
+
+Radicale intentionally does not fully comply with the CalDAV and CardDAV RFCs.
+Instead, it supports the CalDAV and CardDAV implementations of popular
+clients.")
+    (home-page "http://radicale.org/")
+    (license gpl3+)))