Re: [Libguestfs] [PATCH nbdkit] curl: Try to share as much as possible between handles in the pool

Seems sane to me in general, except for the fact that the documentation at <https://curl.se/libcurl/c/CURLSHOPT_SHARE.html> writes: """ CURL_LOCK_DATA_CONNECT Put the connection cache in the share object and make all easy handles using this share object share the connection cache. Note that due to a known bug, it is not safe to share connections this way between multiple concurrent threads. [...] """ Ugh, what? If it's not safe to share the connection cache between threads, then CURL_LOCK_DATA_CONNECT is effectively unusable, and no connection pooling can be done. How does that *not* make this whole curl facility useless? The facility in general looks super weird; what sense does it make *not* to share some particular CURL_LOCK_DATA_xxx?

Laszlo