Enhancement

• Support Server->set(['log_rotation' => SWOOLE_LOG_ROTATION_DAILY]) to generate log file by date (#3311) (@matyhtf)
• Support swoole_async_set(['wait_signal' => true]), reactor will not exit if there is signal listener (#3314) (@matyhtf)
• Support Server->sendfile to send empty file (#3318) (@twose)
• Improve worker idle warning (#3328) (@huanghantao)
• Improve configuration parser about Host (for HTTPS proxy) (#3343) (@twose)
• SSL use ecdh auto (#3316) (@matyhtf)
• SSL quiet shutdown when client close (#3342) (@huanghantao)

Fixed

• Fixed Server->taskWait on OSX (#3330) (@matyhtf)
• Fixed MQTT protocol bug (8dbf506) (@guoxinhua) (2ae8eb3) (@twose)
• Fixed Content-Length int overflow (#3346) (@twose)
• Fixed packet length checker of PRI (#3348) (@twose)
• Fixed CURLOPT_POSTFIELDS (swoole/library@ed192f64) (@twose)
• Fixed the latest connection can not be released before accept new one (swoole/library@1ef79339) (@twose)

Kernel

• Socket zero copy feature (#3327) (@twose)
• Use swoole_get_last_error/swoole_set_last_error to replace global vars (e25f262) (@matyhtf) (#3315) (@huanghantao)