MINOR: No longer rely on deprecated sample fetches for predefined ACLs

Some predefined ACLs were still based on deprecated sample fetches, like
req_proto_http or req_ver. Now, they use non-deprecated sample fetches. In
addition, the usage lines in the configuration manual have been updated to
be more explicit.

(cherry picked from commit 779184e35e4468d86419fb1935ca3491f1081d0b)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
2 files changed