mux-to-mux fast-forwarding will be added. To avoid mix with the splicing and
simplify the commits, the kernel splicing support is removed from the
stconn. CF_KERN_SPLICING flag is removed and the support is no longer tested
in process_stream().
In the stconn part, rcv_pipe() callback function is no longer called.
Reg-tests scripts testing the kernel splicing are temporarly marked as
broken.
If "-dF" command line argument is passed to haproxy to execute the script,
by sepcifying HAPROXY_ARGS variable, http_splicing.vtc is now skipped.
Without this patch, the script fails when the fast-forward is disabled.
A feature command was added to detect if infinite forward is disabled to be
able to skip the script. Unfortunately, it is no supported to evaluate such
expression. Thus remove it. For now, reg-tests must not be executed with
"-dF" option.
The -dF option can now be used to disable data fast-forward. It does the
same than the global option "tune.fast-forward off". Some reg-tests may rely
on this optim. To detect the feature and skip such script, the following
vtest command must be used:
feature cmd "$HAPROXY_PROGRAM -cc '!(globa.tune & GTUNE_NO_FAST_FWD)'"
