Documents the current behavior as implemented in src/discover/discover.c
and src/discover/gitignore.c: where .cbmignore is read from, the glob
features the parser supports, the layered precedence against built-in
skip lists / .gitignore hierarchy / git global excludes, and what
negation can and cannot override today. Planned negation unification
(un-skipping built-in dirs, non-negatable safety core, shared predicate
for auxiliary walkers) is listed in an explicitly not-yet-implemented
subsection. Linked from the README "Ignoring Files" section.
Signed-off-by: Martin Vogel <martin.vogel.tech@gmail.com>
Lars Bergmann