Release SRS Stack v5.8.20

Fix test fail. v5.8.20

• Always dispose DO VM and domain for test. v1.0.306
• Fix docker start failed, cover by test. v1.0.306
• Switch default language to en. v1.0.306
• Support include for SRS config. v1.0.306
• Support High Performance HLS mode. v1.0.307
• Show current config for settings. v1.0.307
• Switch MIT to AGPL License. v1.0.307
• Use one version strategy. v5.8.20

English

• DigitalOcean: Tutorial
• Ubuntu Script: 2a36911353001ee0fee12771a3bb6a33 linux-srs_stack-en.tar.gz
• aaPanel Plugin: 25d7444343f2e15a96aa384e14fb31ce aapanel-srs_stack.zip
• Changelog
• Features

Chinese

• Lighthouse: Tutorial
• Ubuntu Script: 471facc8ee64ce1422eed7fa2479e21a linux-srs_stack-zh.tar.gz
• BT Plugin: d0e2fdd8647f8bae3f2ecf360b2d1946 bt-srs_stack.zip
• aaPanel Plugin: 25d7444343f2e15a96aa384e14fb31ce aapanel-srs_stack.zip
• Changelog
• Features