BUG/MAJOR: config: Wrong maxconn adjustment.

Before c8d5b95 the "maxconn" of the backend of dynamic "use_backend"
rules was not modified (this does not make sense and this is correct).
When implementing proxy_adjust_all_maxconn(), c8d5b95 commit missed this case.
With this patch we adjust the "maxconn" of the backend of such rules only if
they are not dynamic.

Without this patch reg-tests/http-rules/h00003.vtc could make haproxy crash.
1 file changed