Send response on quota exceeded

So far, slcl would just close the connection with a client when the
Content-Length of an incoming request exceeded the user quota, without
any meaningful information given back to the user.

Now, slcl responds with a HTML file with meaningful information about
the error.

Limitations:

- While this commits has been successfully tested on ungoogled-chromium,
LibreWolf (and I assume Firefox and any other derivates too) does not
seem to receive the response from the server.
    - However, this issue only occurred during local testing, but not
on remote instances.

1 files changed, 3 insertions, 2 deletions

diff --git a/handler.c b/handler.c
index 05650ca..22699f5 100644
--- a/handler.c
+++ b/handler.c
@@ -112,13 +112,14 @@ static int on_payload(const struct http_payload *const p,
 }
 
 static int on_length(const unsigned long long len,
-    const struct http_cookie *const c, void *const user)
+    const struct http_cookie *const c, struct http_response *const r,
+    void *const user)
 {
     struct client *const cl = user;
     struct handler *const h = cl->h;
 
     if (h->cfg.length)
-        return h->cfg.length(len, c, h->cfg.user);
+        return h->cfg.length(len, c, r, h->cfg.user);
 
     return 0;
 }