Support Java 11

[wsargent]

Should see how to work the Unsafe shenanigans into JDK 1.9 safely, and establish migration path.

scala/scala-dev#139

[xuwei-k]

compile error with JDK11

ssl-config/ssl-config-core/src/main/scala/com/typesafe/sslconfig/ssl/DefaultHostnameVerifier.scala

Line 40 in d695f63

def matchKerberos(hostname: String, principal: Principal) = HostnameChecker.`match`(hostname, principal.asInstanceOf[KerberosPrincipal])

Welcome to Scala 2.12.7 (Java HotSpot(TM) 64-Bit Server VM, Java 1.8.0_181).
Type in expressions for evaluation. Or try :help.

scala> sun.security.util.HostnameChecker.`match` _
res0: (String, java.security.Principal) => Boolean = $$Lambda$1047/225753796@5ff90645

Welcome to Scala 2.12.7 (Java HotSpot(TM) 64-Bit Server VM, Java 11).
Type in expressions for evaluation. Or try :help.

scala> sun.security.util.HostnameChecker.`match` _
<console>:12: error: value match is not a member of object sun.security.util.HostnameChecker
       sun.security.util.HostnameChecker.`match` _
                                         ^

[dwijnand]

It takes an extra param now: unofficial-openjdk/openjdk@8ffa37c#diff-d3a012ee503c50b9937d3bc83411d719L87 ..

[dwijnand]

Wait, but it's overloaded.. unofficial-openjdk/openjdk@8ffa37c#diff-d3a012ee503c50b9937d3bc83411d719R103

[SethTisue]

see #100

[SethTisue]

@dwijnand @ignasi35 this is now the top blocker (blocking the most downstream projects) in the Scala community build on JDK 11

[dwijnand]

OK, I'll negotiate for it to be part of the next sprint.

[xuwei-k]

https://hg.openjdk.java.net/jdk/jdk11/rev/68fa3d4026ea#l165.29

The match method removed due to TLS 1.3 support.