DOC: config: explain how default matching method for ACL works

In issue #698, it's made apparent that the default matching method for
ACL keywords can be confusing when a converter is applied, because
depending on the converters used, users may think that the default
matching method from the sample fetch name might apply to the whole
expression. It's easier to understand that this doesn't make sense
when thinking about converters turning to completely different types
(e.g. hdr_beg(host),do_resolve() returns an IP, thus it's obvious
that _beg makes no sense at all).  This patch states this in the
doc to avoid future confusion.

(cherry picked from commit 4f4fea417b2c80b2db738a8cf2ea0a3c67ccfc7b)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 73f69e72a7517c4fc44a9a502f0afd49a26b7f51)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
(cherry picked from commit 8e48e62817c24bd74700b986c6efc9b7f21b7deb)
Signed-off-by: Christopher Faulet <cfaulet@haproxy.com>
1 file changed