fix(h2): allow stream-bodied requests to multiplex on a busy session#5538

GiHoon1123 wants to merge 4 commits into

nodejs:mainnodejs/undici:mainfrom

GiHoon1123:fix-issue-5524-h2-sse-post-hangGiHoon1123/undici:fix-issue-5524-h2-sse-post-hangCopy head branch name to clipboard