Fixes for ts-2954
Corresponds to the ts-2954-final.patch attached to that bug
TS-2954
Document changes for use_client_target_addr
TS-2991: SessionManager incorrectly releasing sessions back to pool
TS-2991: Updating Changes
TS-2991: SessionManager incorrectly releasing sessions back to pool
TS-2954: Fix cache poisoning with use_client_target_addr. This closes #101 pull request.
TS-2883: core dump in TSFetchCreate()
TS-2883: Initialize ret value to error condition
Revert "TS-2883: Initialize ret value to error condition"

This reverts commit 31056a5e0cef8d139b2d5d477163e29765d004a2.
TS-2883: Initialize ret value to error condition
TS-2916: set response header properly for combo_handler_plugin
TS-2860: Add AArch64 support
TS-2950: Merge libck master (0.4.3-3-gc4e4702)
TS-2950: Make libck configure and build
TS-1800: Add new hash function base class
TS-1800: Add new hash function implementation of FNV
TS-1800: Add new hash function implementation of MD5
TS-1800: Add new hash function implementation of SipHash
TS-2332: Add Consistent Hash Class
TS-2996: Add consistent hash method to parent selection