Make vpnc depend on packets, instead of selecting them

package/vpnc/Config.in

@@ -1,7 +1,7 @@
 config BR2_PACKAGE_VPNC
 	bool "vpnc"
-	select BR2_PACKAGE_LIBGCRYPT
-	select BR2_PACKAGE_LIBGPG_ERROR
+	depends BR2_PACKAGE_LIBGCRYPT
+	depends BR2_PACKAGE_LIBGPG_ERROR
 	default n
 	help
 	  Client for Cisco VPN concentrator
@@ -12,3 +12,5 @@ config BR2_PACKAGE_VPNC
 
 	  http://www.unix-ag.uni-kl.de/~massar/vpnc
 
+comment "vpnc		- disabled (requires libgcrypt and libgpg_error)"
+	depends !BR2_PACKAGE_LIBGCRYPT || !BR2_PACKAGE_LIBGPG_ERROR