[JENKINS-66379] upgrade winstone to allow non JKS keystores for https certificates (#5670)
* [JENKINS-66379] upgrade winstone to pickup upstream fix The change uses the JVM default keystore. This allows jenkins to be used for TLS termination even when JKS is not the default keystore, or is not allowed for other restrictions. If someone has a non default keystore yet is using a keystore here then this will break on upgrade, however it is unlikely that they would be having a non default keystore as the normal reason for doing that is due to a restriction like FIPS-140 and given the keystore we require has a key using JDK here would be non compliant. * Update war/pom.xml update winstone to release version (5.21)