Upgrade to new libweb interface

Recent commits from libweb brought a few breaking changes. The one below
affected slcl, so it had to be updated according to the new interface:

commit 98f5f52461b0c1ab1ee3331722bd32e2db9e1d41
Author: Xavier Del Campo <xavier.delcampo@midokura.com>
Date:   Thu Nov 16 12:23:08 2023 +0100

    Split handler_loop from handler_listen

    Some applications might set up a struct handler object to listen on any
    port i.e., 0, but still need a way to determine which port number was
    eventually selected by the implementation.

    Therefore, handler_listen has been reduced to the server initialization
    bit, whereas the main loop has been split into its own function, namely
    handler_loop.

    Because of these changes, it no longer made sense for libweb to write
    the selected port to standard output, as this is something now
    applications can do on their own.

2 files changed, 12 insertions, 2 deletions

diff --git a/libweb b/libweb
-Subproject b71a6174e12b4709acaf8bc151938ba12d2a54f
+Subproject dec953e4f4af89149685c7463c422ccca6174cb
diff --git a/main.c b/main.c
index 0c7be51..3f712d6 100644
--- a/main.c
+++ b/main.c
@@ -1325,7 +1325,7 @@ static int upload(const struct http_payload *const p,
         fprintf(stderr, "%s: auth_cookie failed\n", __func__);
         return page_forbidden(r);
     }
-    else if (p->u.post.expect_continue)
+    else if (p->expect_continue)
     {
         *r = (const struct http_response)
         {
@@ -2089,10 +2089,20 @@ int main(int argc, char *argv[])
         .user = a
     };
 
+    unsigned short outport;
+
     if (!(h = handler_alloc(&cfg))
         || add_urls(h, a)
-        || handler_listen(h, port))
+        || handler_listen(h, port, &outport))
+        goto end;
+
+    printf("Listening on port %hu\n", outport);
+
+    if (handler_loop(h))
+    {
+        fprintf(stderr, "%s: handler_loop failed\n", __func__);
         goto end;
+    }
 
     ret = EXIT_SUCCESS;