refs #19

fixes #23

refs #21

refs #23

More cleanup is required though, there are a lot of duplicate functions.
Ultimately, most of the packet functions should be gone in favour of the
knot_wire_* ones.

refs #22

This makes most of the use of the MM context apart from
several places, which are to be refactored:
- constructed RRs
- QNAME

refs #22

- Per user request

cov: 1038957, 1038955

cov:1038956

Conflicts:
	doc/running.texi

Refs #37

- Compilation warning fixed
- Constant with comment added
- Signed count removed
- Added missing header guards
- Changed output of estimation

Refs #37

Caused painfully slow AXFR when RRSIGs came before the covered RRs.

Refs #37

- Changed magic constant to 1.2
- Info about total server memory consumption

Refs #37

- Added malloc overhead (sizeof(size_t) for each allocation, according to libc's malloc.c source file.
- Added minimal malloc chunk size (sizeof(size_t) * 3)
- With magic constant of 1.15, results are OK, but needs more tweaking, only tested with one set of RRs and only on a 64bit system.

Refs #37

 - Used for ahtable size estimation
 - Estimate still not precise, but getting close
 - Added malloc wrapper for trie, but allocated sizes are negligible

  Refs #37

It would otherwise clash with TSIG errors, which are required to
be inverted TSIG RCODEs.

You can disable it by specifying an empty control {} section.

This prevents inconsistency when using DDNS and you update your zone
as well before data in journal is flushed.
To choice is to invalidate data in the journal. If one choses to
revert to previous zone, he has to revert changes in the zone file
and overwrite current journal with the backed up one.
Note that the journal has to have newer mtime.