Notable changes since 3.0.6
f308dde ss-server: fix a use-after-free bug
0b2dce5 ss-redir: fix a mem leak
b7bdb16 ss-local: SOCKS5 UDP associate terminates the connection prematurely
3f0d39a ss-local: use getsockname udp_fd where it applies (fixes local_port==0)
eb30a3d fix possible data loss with salsa20 cipher
0559d8c fix partial nonce data being overwritten
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>