Before merge:

• check on white background;
• provide command line argument to disable highlighting.

PS. I have tested performance of big paste manually. It's Ok.

It does not look alright on white background. So, we cannot merge it.
Need to replace support for colors in replxx, so WHITE will actually mean "intense".

Also it's tempting to add more pleasant, naturally distributed 24bit colors as we have in logs.
But only if we can detect whether it's supported by terminal (for example, it does not work in screen by default).

00993_system_parts_race_condition_drop_zookeeper - reported.

Need to replace support for colors in replxx, so WHITE will actually mean "intense".

Done.

Functional stateless tests (unbundled) — fail: 1, passed: 1873, skipped: 40

The new test cannot work for "unbundled" build, I've disabled it.

Functional stateless tests (debug) — fail: 1, passed: 1904, skipped: 9

Flaky test is reported.

I've noticed a bug when I edit some text with parentheses but I cannot reproduce it more...