Changelog for 2.277.3

Legend:

security fix
major bug fix
bug fix
major enhancement
enhancement

Community feedback:

no major issues
notable issues
required rollback

What's new in 2.277.3 (2021-04-20)

Important security fix. (security advisory)
Winstone 5.16: Update Jetty from 9.4.38.v20210224 to 9.4.39.v20210325 for bug fixes and enhancements. (pull 5380, Winstone 5.16 changelog, Jetty 9.4.39.v20210325 changelog)