gnu: curl: Use updated libssh2 [fixes CVE-2016-7087].

* gnu/packages/curl.scm (curl)[inputs]: Use libssh2.
* gnu/packages/ssh.scm (libssh2-1.4): Remove variable.

gnu/packages/curl.scm

@@ -54,16 +54,7 @@ (define-public curl
    (inputs `(("gnutls" ,gnutls)
              ("gss" ,gss)
              ("libidn" ,libidn)
-
-             ;; XXX libssh2-1.4 is a temporary package for use only by curl,
-             ;; to allow most users of libssh2 to get the security update for
-             ;; CVE-2016-7087 while postponing the large number of rebuilds
-             ;; entailed by updating curl.  Soon, curl should be updated to
-             ;; use the latest libssh2 and libssh2-1.4 should be removed.
-
-             ;; XXX libssh2-1.4 is vulnerable to CVE-2016-0787.
-             ("libssh2" ,libssh2-1.4)
-
+             ("libssh2" ,libssh2)
              ("openldap" ,openldap)
              ("zlib" ,zlib)))
    (native-inputs

gnu/packages/ssh.scm

@@ -112,24 +112,6 @@ (define-public libssh2
    (license license:bsd-3)
    (home-page "http://www.libssh2.org/")))
 
-;;; XXX This is a temporary package for use only by curl, to allow most users
-;;; of libssh2 to get the security update sooner while postponing the large
-;;; number of rebuilds entailed by updating curl.
-;;;
-;;; XXX This package is vulnerable to CVE-2016-7087.
-;;;
-;;; https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-0787
-(define-public libssh2-1.4
-  (package (inherit libssh2)
-    (version "1.4.3")
-    (source (origin
-             (method url-fetch)
-             (uri (string-append "https://www.libssh2.org/download/libssh2-"
-                                 version ".tar.gz"))
-             (sha256
-              (base32
-                "0vdr478dbhbdgnniqmirawjb7mrcxckn4slhhrijxnzrkmgziipa"))))))
-
 (define-public openssh
   (package
    (name "openssh")