cmd/mbf: default daemon socket in cache

This location makes more sense than the current directory.

Signed-off-by: Ophestra <cat@gensokyo.uk>

cmd/mbf/main.go

@@ -70,11 +70,14 @@ func main() {
 		msg.SwapVerbose(!flagQuiet)
 		cm.ctx, cm.msg = ctx, msg
 		cm.base = os.ExpandEnv(cm.base)
+		if cm.base == "" {
+			cm.base = "cache"
+		}
 
 		addr.Net = "unix"
 		addr.Name = os.ExpandEnv(addr.Name)
 		if addr.Name == "" {
-			addr.Name = "daemon"
+			addr.Name = filepath.Join(cm.base, "daemon")
 		}
 
 		return nil