Fixes (#7971)

Fixes (#7971)

Origin: https://github.com/apache/trafficserver/commit/b82a3d192f995fb9d78e1c44d51d9acca4783277
Bug-Debian-Security: https://security-tracker.debian.org/tracker/CVE-2021-27577
Bug-Debian-Security: https://security-tracker.debian.org/tracker/CVE-2021-32565
Bug-Debian-Security: https://security-tracker.debian.org/tracker/CVE-2021-32566
Bug-Debian-Security: https://security-tracker.debian.org/tracker/CVE-2021-32567
Bug-Debian-Security: https://security-tracker.debian.org/tracker/CVE-2021-35474
Bug-Debian: https://bugs.debian.org/990303

* String the url fragment for outgoing requests (#7966)

Co-authored-by: Susan Hinrichs <shinrich@verizonmedia.com>
(cherry picked from commit 2b13eb33794574e62249997b4ba654d943a10f2d)

* Ensure that the content-length value is only digits (#7964)

Co-authored-by: Susan Hinrichs <shinrich@verizonmedia.com>
(cherry picked from commit 668d0f8668fec1cd350b0ceba3f7f8e4020ae3ca)

* Schedule H2 reenable event only if it's necessary

Co-authored-by: Katsutoshi Ikenoya <kikenoya@yahoo-corp.jp>
* Fix dynamic-stack-buffer-overflow of cachekey plugin (#7945)

* Fix dynamic-stack-buffer-overflow of cachekey plugin

* Check dst_size include null termination

(cherry picked from commit 5a9339d7bc65e1c2d8d2a0fc80bb051daf3cdb0b)

Co-authored-by: Bryan Call <bcall@apache.org>
Co-authored-by: Masakazu Kitajo <maskit@apache.org>
Co-authored-by: Katsutoshi Ikenoya <kikenoya@yahoo-corp.jp>
Co-authored-by: Masaori Koshiba <masaori@apache.org>
Gbp-Pq: Name 0018-Fixes-7971.patch