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Description of problem:
strsclnt resumes fewer session than expected

Version-Release number of selected component (if applicable):
nss-3.44.0-7.el8_0

How reproducible:
random, infrequent (around 1 in 500 connections)

Steps to Reproduce:
1. run strsclnt against GnuTLS or OpenSSL server:
/usr/lib64/nss/unsupported-tools/strsclnt -c 10 -P 20 -p 4433 -C :1303 -J rsa_pss_pss_sha256,rsa_pss_pss_sha384,rsa_pss_pss_sha512 -d sql:./ca-db/ -V tls1.3:tls1.3 localhost &> client.log

Actual results:
strsclnt: -- SSL: Server Certificate Validated.
strsclnt: 0 cache hits; 0 cache misses, 0 cache not reusable
          0 stateless resumes
strsclnt: -- SSL: Server Certificate Validated.
strsclnt: -- SSL: Server Certificate Validated.
strsclnt: 7 cache hits; 0 cache misses, 0 cache not reusable
          7 stateless resumes

Expected results:
strsclnt: -- SSL: Server Certificate Validated.
strsclnt: 0 cache hits; 0 cache misses, 0 cache not reusable
          0 stateless resumes
strsclnt: -- SSL: Server Certificate Validated.
strsclnt: -- SSL: Server Certificate Validated.
strsclnt: 8 cache hits; 0 cache misses, 0 cache not reusable
          8 stateless resumes

Additional info:

Setting Release Target to 8.3, the next expect nss rebase assuming upstream has a patch.

This issue is now tracked in Jira: https://issues.redhat.com/browse/CRYPTO-3166