BUG/MINOR: filters: Forward everything if no data filters are called

If a filter enable the data filtering, in TCP or in HTTP, but it does not
defined the corresponding callback function (so http_payload() or
tcp_payload()), it will be ignored. If all configured data filter do the same,
we must be sure to forward everything. Otherwise nothing will be forwarded at
all.

This patch must be forwarded as far as 1.9.
1 file changed