fix(httpx): enforce http11 for both fallback and h2 probe clients#1

wh0amibjm wants to merge 3 commits intocococlaw:fix/algora-2240-http11-no-h2-fallbackcococlaw/httpx:fix/algora-2240-http11-no-h2-fallbackfrom

wh0amibjm:fix/algora-2240-http11-no-h2-fallback-followupwh0amibjm/wh0amibjm-httpx:fix/algora-2240-http11-no-h2-fallback-followupCopy head branch name to clipboard