l2md: define default maildir based on prior set basedir

No need to hard code it once more, so just reuse what we
just defined.

Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
diff --git a/config.c b/config.c
index dacee3d..dcb239a 100644
--- a/config.c
+++ b/config.c
@@ -123,10 +123,10 @@
 
 	cfg->general.period = 60;
 
-	slprintf(path, sizeof(path), "%s/.l2md/", homedir);
+	slprintf(path, sizeof(path), "%s/.l2md", homedir);
 	strlcpy(cfg->general.base, path, sizeof(cfg->general.base));
 
-	slprintf(path, sizeof(path), "%s/.l2md/maildir", homedir);
+	slprintf(path, sizeof(path), "%s/maildir", cfg->general.base);
 	strlcpy(cfg->general.maildir, path, sizeof(cfg->general.maildir));
 }