Puma: v5.2.0 Release

Features

• 10x latency improvement for MRI on ssl connections by reducing overhead ([#2519])
• Add option to specify the desired IO selector backend for libev ([#2522])
• Add ability to set OpenSSL verification flags (MRI only) ([#2490])
• Uses flush after writing messages to avoid mutating $stdout and $stderr using sync=true ([#2486])

Bugfixes

• MiniSSL - Update dhparam to 2048 bit for use with SSL_CTX_set_tmp_dh ([#2535])
• Change 'Goodbye!' message to be output after listeners are closed ([#2529])
• Fix ssl bind logging with 0.0.0.0 and localhost ([#2533])
• Fix compiler warnings, but skipped warnings related to ragel state machine generated code ([#1953])
• Fix phased restart errors related to nio4r gem when using the Puma control server ([#2516])
• Add #string method to Puma::NullIO ([#2520])
• Fix binding via Rack handler to IPv6 addresses ([#2521])

Refactor

• Refactor MiniSSL::Context on MRI, fix MiniSSL::Socket#write ([#2519])
• Remove Server#read_body ([#2531])
• Fail build if compiling extensions raises warnings on GH Actions, configurable via MAKE_WARNINGS_INTO_ERRORS ([#1953])