quark 0.36.0: everything that changed

The full notes for this version are its short notes: that was all that was written then.

Knife throw: right-clicking to throw the knife no longer fires the weapon you switch to (the rocket lob) straight away. Let go of the button, then click again.
Rocket alt-fire: the lob now flies 1.4x as fast (70% of rocket speed), with the same 3x gravity.

Snapshot rate: snapshots are sent at their own rate, separate from the 1000 Hz simulation. The default is 500 per second; --snaprate N changes it (1000 = lowest latency, 250 or less = less CPU and upload).
- Your input is still simulated every millisecond.
- Interpolation of other players grows by about 2 ms (7.1 → 9.2 ms on the localhost test).
Big servers keep the full 1000 Hz tick and send fewer snapshots instead. Before, the whole server dropped to 250 or 500 Hz above 16 players.
Leaner snapshots:
- Your own grapple and dash state is only sent while active.
- Projectile velocity is only sent when it changes.
- Reliable messages are re-sent once per round trip instead of in every snapshot.
- Result: 172 → 129 bytes per snapshot. With half as many snapshots, upload per player is about 62% lower (≈1.4 → 0.5 Mbit/s).
Snapshot buffers are reused instead of being reallocated every send.
An empty server sleeps between ticks instead of busy-waiting.
Benchmark (quark_tests serverbench): Harbor, 12 bots + 4 players, 102 → 69 µs per tick at 1000 Hz.