Embed constants into lib{base,icinga,db_ido}.

Fixes #5247
Update log level for some messages.

Fixes #5357
Fix: Missing warn/crit/min/max values are incorrectly set to 0.

Fixes #5358
Fix that triggered_by field is not of type int in a livestatus response

fixes #5356
Fix crash that might occur in a situation where icinga should not crash...

refs #5356
Add String::Contains().

Refs #5355
Livestatus: Refactor historical tables.

Refs #5351
Refs #5348
Use std::string::find() in String::Contains().

Refs #5355
Fix some more compiler warnings.

Refs #5348
Merge branch 'fix/refactor-hist-tables-5351' into next

Fixes #5348
Fixes #5351
Fixes #5355
Implement "safe mode" for icinga::Deserialize.

Fixes #5035
Implement support for using custom variables as macros.

Fixes #5364
Migration: Revert dumping custom vars as macros.

Refs #5364
Debian: Added package for debug symbols.

Fixes #5362
Fix indices used to access arguments of external commands

fixes #5368
Fix el5 build.

Fixes #5033
Drop 'use feature ...' for el5 perl dependencies.

Refs #5033
Livestatus: Use HistoryTable for log/statehist tables.

Refs #5351
Livestatus: Move log entry parsing into FetchRows().

Refs #5351
Livestatus: Call addRowFn directly in UpdateLogEntries().

Refs #5351
Refs #5369