Roll back Tomcat to 8.0.x
Roll back Tomcat to 8.0.x

I'm not prepared to die on the JASPIC hill today.

See #639.

ChristopherDavenport/http4s,ZizhengTai/http4s,hvesalai/http4s,m4dc4p/http4s,ZizhengTai/http4s,reactormonk/http4s,aeons/http4s,rossabaker/http4s,aeons/http4s,ChristopherDavenport/http4s,hvesalai/http4s,reactormonk/http4s,http4s/http4s,aeons/http4s,hvesalai/http4s,m4dc4p/http4s,reactormonk/http4s,ChristopherDavenport/http4s,ZizhengTai/http4s,rossabaker/http4s,m4dc4p/http4s