Coverity scan #742057 (logically dead code)

Coverity scan #742053 (logically dead code)

Coverity scan #742054 (logically dead code)

Coverity scan #742061 (dereference after null check)

Coverity scan #742118 (resource leak)

Coverity scan #743231 (same on both sides)

Coverity scan #743242 (Unused pointer value)

Coverity scan #742131 (resource leak)

Coverity scan #742132 (resource leak)

refs #2192

refs #2192

refs #2192 4h

fixes #2174

Not so slow with large number of zones now.

refs #2174, #2204

fixes #2182

refs #2176

Unsigned short is sufficient to store maximal number 256.

refs #1291 @5m

refs #1130

refs #1130

refs #937

refs #937

refs #937

- Functions for getting DS digest type and length from RDATA.
- Function for checking DS RDATA (compares the digest length with
  the expected length).
- Added constants for DS digest types and DNSSEC algorithm types
  (the latter is not used yet).
- Function for getting expected DS digest length.
- Modified adjusting functions to check the DS RDATA. Most of the
  function were modified to return some value.

refs #2050 @1h40m