master
tests: always make bundles, adapt build and tests
cmake: rename `testbins` target to `tt`, restore internal option
autotools: limit checksrc target to ignore non-repo test sources
tool_dirhie: fix to create drive-relative directory
tests/tunit: make a separate directory for tool-based unit tests
tidy-up: miscellaneous
build: fix `-Wformat-signedness` by adjusting printf masks
tool1622: assert width and exact format boundaries
build: enable `-Wformat-signedness`, fix issues found
tidy-up: use more `static`, `sizeof()`, `char[]`, double-const