influxdb: fix libflux build

pkgs/servers/nosql/influxdb/default.nix

@@ -26,10 +26,10 @@ let
       # https://github.com/influxdata/flux/pull/5542
       ../influxdb2/fix-unsigned-char.patch
     ];
-    # Don't fail on missing code documentation
+    # Don't fail on missing code documentation and allow dead_code/lifetime warnings
     postPatch = ''
       substituteInPlace flux-core/src/lib.rs \
-        --replace-fail "deny(warnings, missing_docs))]" "deny(warnings))]"
+        --replace-fail "deny(warnings, missing_docs))]" "deny(warnings), allow(dead_code, mismatched_lifetime_syntaxes))]"
     '';
     sourceRoot = "${src.name}/libflux";