GA release v1.1.1

Changes since 1.1.0: v1.1.0...v1.1.1

Notable:

• Use sync.Once to avoid dropping cutover sentry table twice, #755, thanks @MOON-CLJ
• Parsing IPV6 addresses, #640, thanks @shlomi-noach
• Support Azure Database for MySQL, #807, thanks @elemount
• Use Golang 1.15 and remove Debian Jessie (end-of-life) tarball build, #906
• Improved connection type logging, #515, thanks @akshaychhajed
• Fix: Data loss on tables with binary primary key, #915, thanks @cenkore
• Add applier and inspector interactive commands to socket/TCP server, #951

Thank you to all contributors!

$ sha256sum *
8e802e8685d4b7d757ae47513b918d6de1d0402511cc3fadb2d961713beb6d89  gh-ost
6b49bbcf1a985d96fa98954d6aba5b2e8fa9f8b0ac9aee2c10bd47755f986254  gh-ost-1.1.1-1.x86_64.rpm
1188bb2d4539d25fc8a4b8a96cccb9b56a217124a9d4c8b9faab4534acd9258b  gh-ost-binary-linux-20210503150942.tar.gz
1ef5585f926af0d93af53007b563c86a34d52bd4c05e1be5c6afaf8064199d3e  gh-ost-binary-osx-20210503171035.tar.gz
02d39afd96e0b5d69baf6a7259871b664445eaa811ccb6c3928376793b56f997  gh-ost_1.1.1_amd64.deb