gnu: gnurl: Properly deprecate package.

* gnu/packages/gnunet.scm (gnurl): Move to...
* gnu/packages/curl.scm (gnurl): ... here.  Deprecate via
'deprecated-package'.

Reported-by: Ludovic Courtès <ludo@gnu.org>
Change-Id: I779ff9a7923d6532fbac2c2bfd65d6aa56524f1f

gnu/packages/curl.scm

@@ -175,6 +175,8 @@ tunneling, and so on.")
                                    "See COPYING in the distribution."))
     (home-page "https://curl.haxx.se/")))
 
+(define-public gnurl (deprecated-package "gnurl" curl))
+
 (define-public curl-ssh
   (package/inherit curl
     (arguments

gnu/packages/gnunet.scm

@@ -189,8 +189,6 @@ authentication and support for SSL3 and TLS.")
    (license license:lgpl2.1+)
    (home-page "https://www.gnu.org/software/libmicrohttpd/")))
 
-(define-deprecated/public-alias gnurl curl)
-
 (define-public gnunet
   (package
     (name "gnunet")