gnu: libssh: Update to commit 239d0f7 of branch 'v0-7'.

* gnu/packages/ssh.scm (libssh): Update to 239d0f7.

gnu/packages/ssh.scm

@@ -1,5 +1,5 @@
 ;;; GNU Guix --- Functional package management for GNU
-;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017 Ludovic Courtès <ludo@gnu.org>
+;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018 Ludovic Courtès <ludo@gnu.org>
 ;;; Copyright © 2013, 2014 Andreas Enge <andreas@enge.fr>
 ;;; Copyright © 2014, 2015, 2016 Mark H Weaver <mhw@netris.org>
 ;;; Copyright © 2015, 2016 Efraim Flashner <efraim@flashner.co.il>
@@ -62,18 +62,23 @@
   #:use-module (srfi srfi-1))
 
 (define-public libssh
+  ;; This commit from the 'v0-7' branch contains 7 memory-management-related
+  ;; bug fixes that we'd rather have.
+  (let ((commit "239d0f75b5f909174c2ef7fb08d23bcfa6b20ba0")
+        (revision "0"))
     (package
       (name "libssh")
-    (version "0.7.5")
+      (version (git-version "0.7.5" revision commit))
       (source (origin
-              (method url-fetch)
-              (uri (string-append
-                    "https://red.libssh.org/attachments/download/218/libssh-"
-                    version ".tar.xz"))
+                (method git-fetch)
+                (uri (git-reference
+                      (url "https://git.libssh.org/projects/libssh.git")
+                      (commit commit)))
                 (sha256
                  (base32
-                "15bh6dm9c50ndddzh3gqcgw7axp3ghrspjpkb1z3dr90vkanvs2l"))
-              (patches (search-patches "libssh-hostname-parser-bug.patch"))))
+                  "01w72w1jsgs9ilj3n1gp6qkmdxr9n74i5h2nipi3x1vzm7bv8na1"))
+                (patches (search-patches "libssh-hostname-parser-bug.patch"))
+                (file-name (git-file-name name version))))
       (build-system cmake-build-system)
       (outputs '("out" "debug"))
       (arguments
@@ -90,7 +95,7 @@ client and server implementations.  With libssh, you can remotely execute
 programs, transfer files, and use a secure and transparent tunnel for your
 remote applications.")
       (home-page "https://www.libssh.org")
-    (license license:lgpl2.1+)))
+      (license license:lgpl2.1+))))
 
 (define-public libssh2
   (package