- move variable dump to a GHA foldable group.
- minimize scope for an include().
- rename `HIDES_CURL_PRIVATE_SYMBOLS` to `CURL_HIDES_PRIVATE_SYMBOLS`,
to keep it in the curl namespace.
- drop quotes from a version number.
- add missing `Makefile.inc` var refs to comment.
- FindNGTCP2: rename internal var to underscore/lowercase.
- FindBearSSL, FindGSS: whitespace.
Closes#14571