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, 2 insertions, 0 deletions

diff --git a/page.h b/page.h
index 9df1eea..094a21e 100644
--- a/page.h
+++ b/page.h
@@ -17,5 +17,7 @@ int page_resource(struct http_response *r, const char *dir, const char *root,
     const char *res, const struct page_quota *q);
 int page_public(struct http_response *r, const char *res);
 int page_share(struct http_response *r, const char *path);
+int page_quota_exceeded(struct http_response *r, unsigned long long len,
+    unsigned long long quota);
 
 #endif /* PAGE_H */