* chacha20poly1305: add mips32 implementation
"The OpenWRT Commit" - this significantly speeds up performance on cheap
plastic MIPS routers, and presumably the remaining MIPS32r2 super computers
out there.
* timers: reinitialize state on init
* timers: round up instead of down in slack_time
* timers: remove slack_time
* timers: clear send_keepalive timer on sending handshake response
* timers: no need to clear keepalive in persistent keepalive
Andrew He and I have helped simplify the timers and remove some old warts,
making the whole system a bit easier to analyze.
* tools: fix errno propagation and messages
Error messages are now more coherent.
* device: remove allowedips before individual peers
This avoids an O(n^2) traversal in favor of an O(n) one. Before systems with
many peers would grind when deleting the interface.
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>