As we do not really generate ejabbred.cfg, allow at least overwriting it manually

svn path=/nixos/trunk/; revision=15006

etc/default.nix

@@ -259,6 +259,7 @@ import ../helpers/make-etc.nix {
       "kde"
       "cups"
       "ftp"
+      "ejabberd"
       "common"
       "common-console" # shared stuff for interactive local sessions
     ]

etc/pam.d/ejabberd

@@ -0,0 +1,4 @@
+auth     include        common
+account  include        common
+password include        common
+session  include        common

upstart-jobs/ejabberd.nix

@@ -24,7 +24,7 @@ in
             fi
 	    
 	    mkdir -p ${cfg.confDir}
-	    sed -e 's|{hosts, \["localhost"\]}.|{hosts, \[${cfg.virtualHosts}\]}.|' ${pkgs.ejabberd}/etc/ejabberd/ejabberd.cfg > ${cfg.confDir}/ejabberd.cfg
+	    test -f ${cfg.confDir}/ejabberd.cfg || sed -e 's|{hosts, \["localhost"\]}.|{hosts, \[${cfg.virtualHosts}\]}.|' ${pkgs.ejabberd}/etc/ejabberd/ejabberd.cfg > ${cfg.confDir}/ejabberd.cfg
       end script
       
       respawn ${pkgs.bash}/bin/sh -c 'export PATH=$PATH:${pkgs.ejabberd}/sbin; cd ~; ejabberdctl --logs ${cfg.logsDir} --spool ${cfg.spoolDir} --config ${cfg.confDir}/ejabberd.cfg start; sleep 1d'