Non-FastCGI host + Apache mod_deflate: Grav's shutdown early-close emits
Content-Encoding: identity while mod_deflate adds gzip -> two conflicting
headers -> browsers render raw gzip bytes. Fix: debugger.shutdown.close_
connection:false in the prod env override. Documents the dead-end
(cache.gzip/allow_webserver_gzip take the same code path) and the
browser-style curl + screenshot verification.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Np4cMQLF77i664CAQXySzU
