Log Message:
Changes 3.1.19:
* Regression Bug 3441: part 2: Prevent further cache size corruption of
  swap.state
* Bug 3473: erase last uses of obsolete auth_user_hash_pointer
* Bug 3470: GCC 4.7
* Bug 3442: assertion failed: external_acl.cc:908: ch->auth_user_request != NULL
* Bug 3441: part 1: Minimize cache size corruption by malformed swap.state
* Bug 3440: compile error in Adaptation
* Bug 3420: Request body consumption races and !theConsumer exception
* Bug 3370: external ACL sometimes skipping
* Bug 3085: Crash when parsing esi:include
* HTTP/1.1: do not add 110 and 111 Warnings to revalidated responses
* Fix SSL library dependency fixes