The rdata-from-wire parsing is very similar to what compiler
does, so the code should be probably merged and reused.
Also there seems to be some problem with parsing NAPTR.

- Uncommented deep_copy_functions

Conflicts:
	src/libknot/tsig.c

The idea is to die gracefully if memory allocation fails.
Could revert this behavior later on.

Conflicts:
	src/libknot/zone/zone-tree.c

- Added functions to storing/getting dname from trie.
- Disabled until hat-trie is completed.

Conflicts:
	src/zcompile/zcompile.c

- Still needs work - dname table is missing now

- Dnames were handled wrong when freeing RDATA
- Fixed an easy memory leak

- NSEC3PARAM rdata functions added

- Reverted to slower SM in Makefile.am

Conflicts:
	src/common/errcode.h

- Needs a lot of ironing out
- Data from parser are wrong with DNSKEY and NSEC3 RRs

Conflicts:
	src/Makefile.am
	src/common/errcode.h
	src/libknot/rrset.c
	src/libknot/util/descriptor.c
	src/libknot/util/descriptor.h
	src/libknot/zone/zone-contents.c
	src/zcompile/zcompile.c

- Warning to be fixed

fixes 60e9d61d
refs #2192

This reverts commit 060d5e20.
Crashes parsers - cannot free fp as it is used during parsing.

fixes #2236

Coverity #742091 (resource leak)

Coverity #742059 (logically dead code)

Coverity scan #742136 (dereference before null check)

Coverity scan #742057 (logically dead code)