httpism in vtls code

[bagder]

I did this

Make a build with HTTP disabled:

./configure --disable-http --with-openssl
make
...
vtls/vtls.c: In function ‘cf_ssl_create’:
vtls/vtls.c:1664:51: error: ‘struct UrlState’ has no member named ‘http_neg’
 1664 |   ctx = cf_ctx_new(data, alpn_get_spec(data->state.http_neg.wanted,
      |                                                   ^

I expected the following

A clean build

curl/libcurl version

git master

operating system

Linux

[icing]

Propose to fix via #16937