Something broke ci.freebsd.org 's FreeBSD-head-{amd64,i386,riscv64}-{images,testvm} : fetch authentication errors

[Mark Millard]

[Note: around -r33590{4,6,7,8} these build attempts broke
in some cases but FreeBSD-head-{amd64,i386,riscv64}-{images,testvm}
just was never built for such. FreeBSD-head-amd64-testvm
first fails at -r335904 but FreeBSD-head-amd64-images
built -r335904 and failed for -r335908. Both i386's jumped
from -r335902 (built) to -r335907 (failed). riscv64's: from
-r335905 (built) to -r335907 (failed).]

Example: https://ci.freebsd.org/job/FreeBSD-head-amd64-testvm/8651/console
shows:

. . .
20:23:29 setup jail FreeBSD-head-amd64-testvm using following parameters:
. . .
20:23:29 Certificate verification failed for /CN=artifact.ci.freebsd.org
20:23:29 34364199992:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
20:23:29 fetch: https://artifact.ci.FreeBSD.org/snapshot/head/r329172/amd64/amd64/base.txz: Authentication error
. . .
20:24:04 + DIST_PACKAGES='base kernel doc tests base-dbg kernel-dbg lib32 lib32-dbg'
20:24:04 + mkdir -p ufs
20:24:04 + fetch https://artifact.ci.freebsd.org/snapshot/head/r335904/amd64/amd64/base.txz
20:24:04 Certificate verification failed for /CN=artifact.ci.freebsd.org
20:24:04 34364183608:error:14090086:SSL routines:ssl3_get_server_certificate:certificate verify failed:/usr/src/crypto/openssl/ssl/s3_clnt.c:1269:
20:24:04 fetch: https://artifact.ci.freebsd.org/snapshot/head/r335904/amd64/amd64/base.txz: Authentication error
20:24:04 Build step 'Execute shell' marked build as failure
20:24:04 FTP: Current build result is [FAILURE], not going to run.



===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)