config.h: use common default font, pass Xft font name to dmenu

dmenu uses Xft now (soon to be released).

config.def.h

@@ -2,11 +2,9 @@
 
 /* appearance */
 static const char *fonts[] = {
-    "Sans:size=10.5",
+	"monospace:size=10"
-    "VL Gothic:size=10.5",
-    "WenQuanYi Micro Hei:size=10.5",
 };
-static const char dmenufont[] = "-*-terminus-medium-r-*-*-16-*-*-*-*-*-*-*";
+static const char dmenufont[]       = "monospace:size=10";
 static const char normbordercolor[] = "#444444";
 static const char normbgcolor[]     = "#222222";
 static const char normfgcolor[]     = "#bbbbbb";