share-functions, sometimes refered to as a share handle on some places in the
documentation. This init call MUST have a corresponding call to
\fIcurl_share_cleanup\fP when all operations using the share are complete.
+
+This \fIshare handle\fP is what you pass to curl using the \fICURLOPT_SHARE\fP
+option with \fIcurl_easy_setopt(3)\fP, to make that specific curl handle use
+the data in this share.
.SH RETURN VALUE
If this function returns NULL, something went wrong (out of memory, etc.)
and therefore the share object was not created.