Summary: Merge delay class 4 performance enhancements.

Summary: Merge delay class 4 performance enhancements.
Keywords:

Patches applied:

  * robertc@squid-cache.org--squid/squid--delay-class-4--3.0--patch-31
     Convert ACL.h listed types to SplayNode.

  * robertc@squid-cache.org--squid/squid--delay-class-4--3.0--patch-30
     Make splay trees typesafe, and use in DelayUser class.

  * robertc@squid-cache.org--squid/squid--delay-class-4--3.0--patch-29
     Separate splay usage from global includes.