Cacheable() now refuses X-Turbo-Short-Circuit responses (partial <meta>
payloads meant to merge client-side, would serve blank pages on later
hits). StoreKey() lets callers whose request identity is rewritten before
store (e.g. mirror Host routing) pin the key so Lookup and Store agree.
Bump github.com/go-gost/core to v0.6.1.
Implements the cache.Cache interface with in-memory backend (TTL,
maxSize/maxBytes bounds, oldest/LRU eviction, background cleanup).
Adds httpcache layer for HTTP response policy (per-status TTL,
serve-stale, method/body filtering). Wires into config parser,
loader, registry, and all four sniffing handlers (forward/local,
forward/remote, sni, http) so HTTP responses are cached before
dialing upstream.
Bumps core dependency to v0.6.0 for the new cache.Cache interface.
ginuerzh