Add README.md file to rsabigexponent system test

This README.md describes why is bigkey needed.
76 jobs for !4579 with mnowak/add-rsabigexponent-README in 61 minutes and 56 seconds (queued for 11 seconds)
detached
Status Job ID Name Coverage
  Autoconf
passed #1412618
amd64 linux
autoreconf

00:00:16

 
  Precheck
passed #1412620
amd64 linux
clang-format

00:00:18

passed #1412621
amd64 linux
coccinelle

00:03:43

passed #1412622
amd64 linux
danger

00:00:14

passed #1412619
amd64 linux
misc

00:00:17

passed #1412623
amd64 linux
tarball-create

00:01:33

 
  Build
passed #1412636
amd64 linux
clang:asan

00:01:57

passed #1412640
amd64 linux
clang:buster:amd64

00:01:03

passed #1412643
amd64 libvirt
clang:freebsd11:amd64

00:01:07

passed #1412644
amd64 libvirt
clang:freebsd12:amd64

00:01:10

passed #1412645
amd64 libvirt
clang:openbsd:amd64

00:02:24

passed #1412638
amd64 linux
clang:tsan

00:01:06

passed #1412624
amd64 linux
gcc:alpine3.12:amd64

00:00:57

passed #1412635
amd64 linux
gcc:asan

00:01:44

passed #1412628
amd64 linux
gcc:buster:amd64

00:00:43

passed #1412625
amd64 linux
gcc:centos7:amd64

00:00:52

passed #1412626
amd64 linux
gcc:centos8:amd64

00:00:51

passed #1412634
amd64 linux
gcc:focal:amd64

00:00:50

passed #1412639
amd64 linux
gcc:mutexatomics

00:00:59

passed #1412630
amd64 linux
gcc:out-of-tree

00:00:48

passed #1412629
amd64 linux
gcc:sid:amd64

00:01:10

passed #1412631
i386 linux
gcc:sid:i386

00:00:53

passed #1412641
amd64 linux
gcc:softhsm2.4

00:00:58

passed #1412642
amd64 linux
gcc:softhsm2.6

00:01:00

passed #1412627
amd64 linux
gcc:stretch:amd64

00:01:02

passed #1412637
amd64 linux
gcc:tsan

00:01:06

passed #1412632
amd64 linux
gcc:tumbleweed:amd64

00:00:56

passed #1412633
amd64 linux
gcc:xenial:amd64

00:00:58

passed #1412646
amd64 windows
msvc:windows:amd64

00:00:59

 
  Unit
passed #1412658
amd64 linux
unit:clang:asan

00:01:20

passed #1412662
amd64 linux
unit:clang:buster:amd64

00:01:09

failed #1412665
amd64 libvirt
unit:clang:freebsd11:amd64

01:00:00

passed #1412666
amd64 libvirt
unit:clang:freebsd12:amd64

00:01:27

passed #1412667
amd64 libvirt
unit:clang:openbsd:amd64

00:03:00

passed #1412660
amd64 linux
unit:clang:tsan

00:03:05

passed #1412647
amd64 linux
unit:gcc:alpine3.12:amd64

00:01:04

passed #1412657
amd64 linux
unit:gcc:asan

00:01:20

passed #1412651
amd64 linux
unit:gcc:buster:amd64

00:02:05

passed #1412648
amd64 linux
unit:gcc:centos7:amd64

00:01:12

passed #1412649
amd64 linux
unit:gcc:centos8:amd64

00:01:05

passed #1412656
amd64 linux
unit:gcc:focal:amd64

00:01:07

passed #1412661
amd64 linux
unit:gcc:mutexatomics

00:01:10

passed #1412652
amd64 linux
unit:gcc:sid:amd64

00:01:05

passed #1412653
i386 linux
unit:gcc:sid:i386

00:01:07

passed #1412663
amd64 linux
unit:gcc:softhsm2.4

00:01:07

passed #1412664
amd64 linux
unit:gcc:softhsm2.6

00:01:08

passed #1412650
amd64 linux
unit:gcc:stretch:amd64

00:01:13

passed #1412659
amd64 linux
unit:gcc:tsan

00:03:50

passed #1412654
amd64 linux
unit:gcc:tumbleweed:amd64

00:01:06

passed #1412655
amd64 linux
unit:gcc:xenial:amd64

00:01:06

 
  System
passed #1412679
amd64 linux
system:clang:asan

00:13:26

passed #1412683
amd64 linux
system:clang:buster:amd64

00:11:35

failed #1412686
amd64 libvirt
system:clang:freebsd11:amd64

00:11:56

passed #1412687
amd64 libvirt
system:clang:freebsd12:amd64

00:11:32

passed #1412681
amd64 linux
system:clang:tsan

00:15:48

passed #1412668
amd64 linux
system:gcc:alpine3.12:amd64

00:13:12

passed #1412678
amd64 linux
system:gcc:asan

00:13:36

passed #1412672
amd64 linux
system:gcc:buster:amd64

00:13:36

passed #1412669
amd64 linux
system:gcc:centos7:amd64

00:12:10

passed #1412670
amd64 linux
system:gcc:centos8:amd64

00:12:34

passed #1412677
amd64 linux
system:gcc:focal:amd64

00:12:18

passed #1412682
amd64 linux
system:gcc:mutexatomics

00:11:37

passed #1412673
amd64 linux
system:gcc:sid:amd64

00:11:24

passed #1412674
i386 linux
system:gcc:sid:i386

00:13:03

passed #1412684
amd64 linux
system:gcc:softhsm2.4

00:11:25

passed #1412685
amd64 linux
system:gcc:softhsm2.6

00:12:19

passed #1412671
amd64 linux
system:gcc:stretch:amd64

00:11:30

passed #1412680
amd64 linux
system:gcc:tsan

00:16:14

passed #1412675
amd64 linux
system:gcc:tumbleweed:amd64

00:12:29

passed #1412676
amd64 linux
system:gcc:xenial:amd64

00:11:40

 
  Docs
passed #1412688
amd64 linux
docs

00:00:43

 
  Postcheck
passed #1412692
amd64 linux
cppcheck

00:00:43

passed #1412689
amd64 linux
flake8

00:00:19

passed #1412693
amd64 linux
gcov

00:00:32

77.0%
passed #1412690
amd64 linux
pylint

00:00:20

passed #1412691
amd64 linux
scan-build

00:04:12

 
Name Stage Failure
failed
unit:clang:freebsd11:amd64 Unit The script exceeded the maximum execution time set for the job
--- random_test.log ---
PASS: random_test
--- udp_test.log ---
PASS: udp_test
--- task_test.log ---
PASS: task_test
--- timer_test.log ---
PASS: timer_test
ERROR: Job failed: execution took longer than 1h0m0s seconds
failed
system:clang:freebsd11:amd64 System

$ test -n "${OUT_OF_TREE_WORKSPACE}" && mv "${OUT_OF_TREE_WORKSPACE}" "${CI_PROJECT_DIR}"
Uploading artifacts for failed job
Uploading artifacts...
Runtime platform
arch=amd64 os=freebsd pid=65166 revision=ece86343 version=13.5.0
untracked: found 1520 files

Uploading artifacts as "archive" to coordinator... ok
id=1412686 responseStatus=201 Created token=s2uqY9vH
Cleaning up file based variables
ERROR: Job failed: exit status 1