Pending RELEASE-NOTES for the upcoming release

This is work in progress and will change before the release goes public on 31st of August 2022.

Changes:

Bugfixes:

• THANKS: merged two entries for Evgeny Grin
• lib/curl_path.c: add ISC to license expression
• hyper: use wakers for curl pause/resume
• Makefile.m32: do not set the libcurl.rc debug flag [ci skip]
• curl.h: CURLE_CONV_FAILED is obsoleted
• curl: output warning when a cookie is dropped due to size
• curl_mime_data.3: polish the wording
• configure: check for the stdatomic.h header in configure
• easy_lock: fix the #ifdef conditional for ia32_pause
• easy_lock: switch to using atomic_int instead of bool
• ngtcp2: fix incompatible function pointer types
• easy_lock.h: use __asm__ instead of asm to fix build
• libcurl-security.3: fix typo on macro "SH_"
• easy_lock.h: include sched.h if available to fix build

Contributors:

Adam Sampson, Daniel Stenberg, Evgeny Grin (Karlson2k), Harry Sintonen, Jilayne Lovejoy, Joshua Root, Ray Satiro, Ryan Schmidt, Samuel Henrique, Sean McArthur, Viktor Szakats