[v2] Fix HTTP 100 Continue parsing to accept optional reason phrase #9690
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Issue #, if available:
aws-cli: N/A
botocore: boto/botocore#3455
Fixed in botocore 1.40.21
Description of changes:
Fix 100-continue behaviour with servers that do not send the optional reason phrase on 100-continue responses.
See https://www.rfc-editor.org/rfc/rfc9110.html#section-15.1
AWS CLI v1 regularly updates boto / botocore, the newest version includes the fix.
AWS CLI v2 seems to have a copy of some old version of boto / botocore that needs a separate fix.
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