dnstable: Add dnstable_entry_set_iszone() function

This function stores a boolean "iszone", which we'll make use of in the
formatting functions.
entry: dnstable_entry_to_text(): Alter output based on iszone flag

If 'iszone' is set on the entry object, we need to generate a slightly
different text format.
entry: dnstable_entry_to_json(): Alter output based on iszone flag

If 'iszone' is set on the entry object, we need to use the keys
'zone_time_first' and 'zone_time_last' instead of 'time_first' and
'time_last'.
entry: dnstable_entry_to_json(): Use the DNSDB API rdata format

In order to make dnstable_entry_to_json() generate the same format that
the DNSDB API uses:

 - Also output the count, time_first, and time_last fields for rdata
   entries.

 - Format the rrtype as a mnemonic rather than a bare integer.
Merge pull request #2 from farsightsec/branches/zone-time-fixes

Branches/zone time fixes
dnstable_entry_to_json(): Fix mismatch between type of e->rrtype and the format string
Merge branch 'branches/dnsdb-rdata-json' into next
configure.ac: next has 0.7.0 in development
dnstable/libdnstable.sym: Fix up the linker script syntax
ChangeLog: 0.7.0
Bump version to 0.7.0
debian/gbp.conf: Switch to pristine-tar
debian/control: Update Maintainer, Standards-Version
Imported Upstream version 0.7.0
Merge tag 'upstream/0.7.0' into debian

Upstream version 0.7.0
debian/libdnstable0.symbols: 0.7.0
debian/control: Build-Depend on libnmsg-dev >= 0.9.0

libnmsg-dev as of 0.9.0 no longer has a missing dependency on
libpcap0.8-dev, so drop the Build-Depend on libpcap0.8-dev.
debian/control: Build-Depend on libprotobuf-c-dev, not libprotobuf-c0-dev
debian/control: Avoid depending on a specific ABI version of the sie-nmsg message module

src:sie-nmsg 0.17.0-2 introduces a virtual package "nmsg-msg-module-sie"
that we can depend on without encoding a specific ABI version into the
dependency list.
debian/changelog: 0.7.0-1