v2.0 release. See RELEASE_NOTES.md for the full v1->v2 porting summary.
SOVERSION bumped: shared library now ships as libhttpserver.so.2
(Linux) / libhttpserver.2.dylib (Darwin). Parallel-installable
with any prior libhttpserver.so.0/1 on disk (runtime artefacts
only; dev-time .la/.a/.pc/headers are last-installer-wins by
design).
Added per-function cyclomatic complexity gate
(scripts/check-complexity.sh via `lizard`) and copy/paste
detection gate (scripts/check-duplication.sh via PMD CPD with
the C++ tokenizer), wired into the existing CI lint lane and
exposed locally as `make lint-complexity` /
`make lint-duplication`. Initial CCN ceiling intentionally set
above the current worst offender so CI stays green; ratcheted
down per refactor commit until reaching the long-term target
of 10. Duplication gate runs at PMD's default
minimum-tokens=100 from day one (currently zero hits).
