doc: improve UV_THREADPOOL_SIZE description
The UV_THREADPOOL_SIZE
documentation claims that only three crypto
APIs use the thread pool, which is not true anymore. This commit lists all relevant APIs and rephrases it such that future API additions are included in the documentation.
Checklist
-
make -j4 test
(UNIX), orvcbuild test
(Windows) passes -
documentation is changed or added -
commit message follows commit guidelines