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/cache.go

@@ -31,9 +31,6 @@ func (cache *cache) open() (err error) {
 		return os.ErrInvalid
 	}
 
-	if cache.base == "" {
-		cache.base = "cache"
-	}
 	var base *check.Absolute
 	if cache.base, err = filepath.Abs(cache.base); err != nil {
 		return