libknot: exported dynamic symbols cleanup

...except OSX where the compile option is not available

See merge request !617

...except OSX where the compile option is not available

Reported by Thiago Farina <tfarina@chromium.org>

tests-extra: add test for basic zone and config commands

See merge request !611

Kjournalprint utility added + necessary changes...

See merge request !614

fix double free when loading zone with journal

See merge request !613

Fixing #484

See merge request !610

knot_pkt_begin: fix beginning the same section again

The .pos value might get wrong (though I see no usage ATM).

Notes:
- It still returns KNOT_EOK in case of equality; that's due to usage
  in resolver and requirement to special-case KNOT_ANSWER anyway.
- I would personally assert(false) on all internal failures (e.g. EINVAL),
  as immediate abortion seems preferrable when in debug mode, but the
  code around typically doesn't do that, so I left it without assertions.

See merge request !609

The .pos value might get wrong (though I see no usage ATM).

Notes:
- It still returns KNOT_EOK in case of equality; that's due to usage
  in resolver and requirement to special-case KNOT_ANSWER anyway.
- I would personally assert(false) on all internal failures (e.g. EINVAL),
  as immediate abortion seems preferrable when in debug mode, but the
  code around typically doesn't do that, so I left it without assertions.

Fixing https://gitlab.labs.nic.cz/labs/knot/issues/486

See merge request !608

Spelling, grammar, and typo cleanup

See merge request !606