Update to Jetty 9.4.22.v20191022

[davidkarlsen]

See issue jetty/jetty.project#4141
Running on java 12 + spring security 5.1.6 + jetty 9.4.21 - same mix worked with jetty 9.4.20

[joakime]

Jetty has been able to replicate this issue without spring-security in the mix.
A fix is being reviewed and a new release is likely.

[joakime]

Jetty 9.4.22.v20191022 fixes this issue. (now available on Maven Central)