use DWCONFIG according with systemd script

config/amd64.config

@@ -6,4 +6,4 @@ architecture = "amd64"
 port = 8064
 
 # DO NOT EDIT THIS LINE:
-config = require(process.env.DW + '/config/mergerconfig.coffee')(architecture, port)
+config = require(process.env.DWCONFIG + '/mergerconfig.coffee')(architecture, port)

config/armel.config

@@ -6,4 +6,4 @@ architecture = "armel"
 port = 8001
 
 # DO NOT EDIT THIS LINE:
-config = require(process.env.DW + '/config/mergerconfig.coffee')(architecture, port)
+config = require(process.env.DWCONFIG + '/mergerconfig.coffee')(architecture, port)

config/armhf.config

@@ -6,4 +6,4 @@ architecture = "armhf"
 port = 8002
 
 # DO NOT EDIT THIS LINE:
-config = require(process.env.DW + '/config/mergerconfig.coffee')(architecture, port)
+config = require(process.env.DWCONFIG + '/mergerconfig.coffee')(architecture, port)

config/i386.config

@@ -6,4 +6,4 @@ architecture = "i386"
 port = 8083
 
 # DO NOT EDIT THIS LINE:
-config = require(process.env.DW + '/config/mergerconfig.coffee')(architecture, port)
+config = require(process.env.DWCONFIG + '/mergerconfig.coffee')(architecture, port)

config/powerpc.config

@@ -6,4 +6,4 @@ architecture = "powerpc"
 port = 8003
 
 # DO NOT EDIT THIS LINE:
-config = require(process.env.DW + '/config/mergerconfig.coffee')(architecture, port)
+config = require(process.env.DWCONFIG + '/mergerconfig.coffee')(architecture, port)

scripts/make_config.sh

@@ -11,4 +11,4 @@ architecture = \"$ARCH\"
 port = $PORT
 
 # DO NOT EDIT THIS LINE:
-config = require(process.env.DW + '/config/mergerconfig.coffee')(architecture, port)
+config = require(process.env.DWCONFIG + '/mergerconfig.coffee')(architecture, port)