Write data from an evbuffer to a bufferevent buffer. The evbuffer is
being drained as a result.
@param bufev the bufferevent to be written to
@param buf the evbuffer to be written
@return 0 if successful, or -1 if an error occurred
@see bufferevent_write()
Write data from an evbuffer to a bufferevent buffer. The evbuffer is being drained as a result.
@param bufev the bufferevent to be written to @param buf the evbuffer to be written @return 0 if successful, or -1 if an error occurred @see bufferevent_write()