transmission: add enableDaemon flag

pkgs/applications/networking/p2p/transmission/default.nix

@@ -2,6 +2,7 @@
 , openssl, curl, libevent, inotify-tools, systemd, zlib
 , enableGTK3 ? false, gtk3
 , enableSystemd ? stdenv.isLinux
+, enableDaemon ? true
 , enableCli ? true
 }:
 
@@ -31,6 +32,7 @@ stdenv.mkDerivation rec {
 
   configureFlags = [
       ("--enable-cli=" + (if enableCli then "yes" else "no"))
+      ("--enable-daemon=" + (if enableDaemon then "yes" else "no"))
     ]
     ++ optional enableSystemd "--with-systemd-daemon"
     ++ optional enableGTK3 "--with-gtk";