libssh2_poll - poll for activity on a socket, channel or listener
int libssh2_poll(LIBSSH2_POLLFD *fds, unsigned int nfds, long timeout);
This function is deprecated. Do note use. We encourage users to instead
use the poll(3) or select(3) functions to check for socket activity or
when specific sockets are ready to get recevied from or send to.
Poll for activity on a socket, channel, listener, or any combination of
these three types. The calling semantics for this function generally
match poll(2) however the structure of fds is somewhat more complex in
order to accommodate the disparate datatypes, POLLFD constants have
been namespaced to avoid platform discrepancies, and revents has
additional values defined.
Number of fds with interesting events.