* logging: Initial implementation
* logging: More encoder formats, better defaults
* logging: Fix repetition bug with FilterEncoder; add more presets
* logging: DiscardWriter; delete or no-op logs that discard their output
* logging: Add http.handlers.log module; enhance Replacer methods
The Replacer interface has new methods to customize how to handle empty
or unrecognized placeholders. Closes#2815.
* logging: Overhaul HTTP logging, fix bugs, improve filtering, etc.
* logging: General cleanup, begin transitioning to using new loggers
* Fixes after merge conflict
* Tests for Replacer: Replacer.Set and Replacer.Delete
* update replacer test to new implementation
* fix replacer: counted position wrong if placeholder was found
* fix replacer: found placeholder again, if it was a non-existing one
* test with spaces between the placeholders as this could have a different behaviour
* Tests for Replacer.Map
* Tests for Replacer.Set: check also for something like {l{test1}
This should be replaced as {lTEST1REPLACEMENT
* fix replacer: fix multiple occurrence of phOpen sign
* Tests for Replacer: rewrite Set and ReplaceAll tests to use implementation not interface
* Tests for Replacer: rewrite Delete test to use implementation not interface
* Tests for Replacer: rewrite Map tests to use implementation not interface
* Tests for Replacer: add test for NewReplacer
* Tests for Replacer: add test for default replacements
* Tests for Replacer: fixed and refactored tests
* Tests for Replacer: moved default replacement tests to New-test
as new should return a replace with provider which defines global replacements
