Update zone timers just when server shutdown

Closes #405

RRSets: allow TTL updates over DDNS

Solves #312, but with fewer changes than !416.

See merge request !418

Dnsproxy fix

fixes #401

See merge request !415

Marek Vavruša authored 9 years ago and Daniel Salzman committed 9 years ago

moved the module at the end of query plan since it may rewrite the
answer completely from the upstream, no local headers should be added

zone: add request EDNS option support

See merge request !412

New wire API

#380

 - New wire API in libknot/internal/wire_ctx.h
 - Code is refactored into new API only in cases, where it makes sense. (max length is known)

See merge request !395

libknot: don't compress zero label dname

See merge request !414

Doc: Improve Troubleshooting

See merge request !411