Update man pages

Add dnsip6.1 and dnsip6q.1

Update dnsfilter.1, dnsip.1, dnsipq.1, dnsmx.1, dnsname.1, dnsq.1, dnsqr.1,
dnstrace.1, dnstxt.1 and tinydns-get.1 to reflect added dnsip6 and dnsip6q.

Signed-off-by: Giam Teck Choon <giamteckchoon@gmail.com>