dnstap not logging resolver response messages

dnstap-log-resolver-response-messages option has no effect unless
dnstap-log-resolver-query-messages option is also enabled.

The sample config from the dnstap website[1] works fine because it has
both of the mentioned options set, but if one wants to log resolver
responses only, the following config won't do:

dnstap:
    dnstap-enable: yes
    dnstap-log-resolver-response-messages: yes

[1] http://dnstap.info/Examples/

Index: dnstap/dnstap.c

Hi Nikolay,

dnstap-log-resolver-response-messages option has no effect unless
dnstap-log-resolver-query-messages option is also enabled.

Thank you for the patch, I have applied it.

Best regards, Wouter